I just rewatched the video and I remembered one of them was mono. I was trying so hard to figure out which one it was and I picked wrong. That was the weirdest feeling ever when I realized I was wrong
That was the absolute worst. Of all time. I feel like I need to make a special trophy for just how absolutely terrible it was. Like, legitimately, literally *absolutely*. I honestly don't think you can get worse than that one. We'd need to recalibrate the core tenets of groan science if one was ever discovered.
You don't even know. I didn't even know what he was talking about half the time yet I was able to really show my family what it feels like to not be able to tell colors apart.
And it was a great prop for realising just how skewed our perception is without a good spectrum of light! It wouldn't have crossed my mind to think they'd look the same
@@zsigio6114 no, it didn't. otherwise he would have noticed while editing. people perceive colors differently. more specifically people perceive colors obscured by shade differently. it's the same thing as with The Dress of 2015.
"Oh this one's actually monochromatic, let me get that outta here..." I REALLY got a kick out this. If anyone somehow wasn't following your point, this would INSTANTLY drive it home. As someone who has studied the psychology of learning, I must applaud.
Yeah. Like everything seems just grayscale under monochromatic light. After some time when your eyes adapt to the monochromatic light, every single color just seems like shade of gray. You don't even see the color, because your white balance just shifts towards red (or whatever that monochrome color is). Being able to see only one color is very limiting. However that representation isn't quite realistic depiction of how colorblind people with achromatic vision see the world around them. You're filtering out just single wavelength, which first of all creates very limited color palette, and then your eyes take that as white balance point, so you get adjusted to a new light. In this situation, the other two colors gets filtered out, which means those colors (and colors that do not contain the lighting color) appear solid black. That's not how achromatic vision works and looks like. Achromatic vision is complete loss of color vision, which means your cones eighter don't work or are completely missing. Therefore you can only percept brightness, such you cannot see any color. Everything appears the same color, which is best represented as grayscale (everyone has slightly different vision). You cannot tell that such person is seeing in grayscale. In reality, he doesn't really know how colors look like, he doesn't know what gray actually is. He has no means to compare different colors, everything is the same color to him. There are no colors filtered out, that person just has no means to receive informations about colors. Best representation is Photoshop's "grayscale" filter which averages colors based on their relative brightness to other colors. This is effectively best approximation, yet still not perfect. In reality, we don't really know.
I'm sure there are lots of things in this video that you already knew, but I hope that the things you see here help to provide you with a deeper understanding. In other words, I hope I was able to shine a new light on an ever-interesting topic!
isn’t the part of the rubiks cube still showing green when there is no more light due to luminescence (the color light energy gets absorbed and when no more light is present it radiates the absorbed energy back) , it is one of the reasons we can still see some shapes even in almost pure darkness when for instance a basement light turns off)
Maybe you could make a video on color gamuts, and the reason why a real four-color screen (not Sharp's gimmicky and dishonest Quattron) might really enable it to display a wider range of colors.
I watched and saw your correction to say the ink appeared a little blue but I'm going to comment and say you said it turned black while lit by blue just because I can. I feel left out when all the people who don't watch before commenting get to yell at you but I don't.
On an odd tangent, I watched this with my husband. He too saw it as grey but I insisted I saw a faint purpley-grey rather than a flat out grey. Even when I covered most the image to account for the bias of the brighter whites influencing me... I saw a dull purple shade. Remember how he mentioned violet is at the very edge of our visual color spectrum? Females have been known to see into the violet spectrum further than their male counterparts. Females also have the ultra rare possibility of having a special kind of "color blindness" that allows them to see ultra violet light. My guess would be you were most likely born female and can see a glimpse into the edge of our visual spectrum where Alec can not.
Yeah, I saw the purple too. Also, a dude. I think this is one of those things coming from white-balance. Kinda like that blue/gold dress that went viral a few years ago. My guess is he saw it as grey, but it looked clearly purple to me as well.
@@clueless_cutie " Females have been known to see into the violet spectrum further than their male counterparts. Females also have the ultra rare possibility of having a special kind of "color blindness" that allows them to see ultra violet light." That is neat, but its not really relevant here since its an RGB video. There isn't any violet or ultraviolet in the image cause the shortest wavelength coming off the display is blue.
Not just pretty purple for me, supes purple. Probably variation in the peaks of our green and red cone spectrum graphs. Mine may be further apart than those who see grey.
The Outer Limits was in monochrome, so there was less to fool with. (Except vertical and horizontal hold. It's amazing to look back and realize those early sets were so primitive and sloppy they needed adjustment at times, even though the signal had all the necessary sync information to do it automatically.)
@@Carewolf from my understanding it's your brain being able to distinguish the blue and green channels from the reflection of the etch a sketch and determining that color as red. This is just a guess, but it's my best one
5:32 note that rods don't just 'detect brightness', they are in essence a chromatic sensor just like the cones (centered around 500 nm which is turquoise), just not used by the brain as such. So the brain detects brightness through rods, and detects colors through cones. And because rods aren't overall brightness sensors (but rather what a blue/green cone would be), that causes you to lose red vision at night and other low light conditions. Hence why we associate a blue hue, low brightness image with night time.
"...that causes you to lose red vision at night and other low light conditions." Would this also be why I've seen astrophotographers and astronomers use red LEDs when they're stargazing?
@@ThomasFerguson22 the quoted phenomenon is named "Purkinje effect" (see Wikipedia article). As for why people use red lights at night (i've seen some urban explorers with red headlights): receptors that control pupilary light reflex are even more blue-shifted than rods: 480 nm versus 500 nm for rods. If you're interested, the name is "Intrinsically photosensitive retinal ganglion cells" (also on Wikipedia).
Unless you're hiding in a 100 percent dark room or the eldritch abyss, anything black would ironically stand out in low light conditions. Black is rarely found in most environments; grass is not black, trees are not black, houses, hallways and buildings are not black.
The differences between a "real" white light and a "composite" white light comprised of monochromatic red/green/blue added together, was completely fascinating to me! It had never occurred to me that there would be a difference. Can't wait for the video on your other channel to learn more about it.
I'm still having a hard time wrapping my head around it, because I was taught that what we perceive as white is the combination of the colors of the spectrum. "Monochromatic white" sounds like a contradiction in terms to me.
get your self a floor lamp with 3 sockets and get your self a red party bulb a green one and a blue one focus them into a composite white light(preferably on a white surface) then stand in front of it... rainbow shadows
@@joesterling4299 It's worth noting that light is a spectrum; monochromatic refers to a very narrow wavelength. Photons are only produced at certain wavelengths (which is how we determine the composition of stars), and different pigments can have different reflective/absorptive/or re-emission spectra. When presented with a narrow wavelength, a pigment can only reflect a narrow wavelength. Our vision is receptive to all wavelengths, and determines the wavelength based on the intensity of light received after it has been filtered by the cone. As TC mentioned, artificial white light is replicating a broad spectrum through an averaged stimulation of three narrow spectra. This means that the pigment interactions at any wavelength outside of these won't be realised. Similarly, think about how making coloured lights differs from making coloured objects. An objects colour can be created by adding varying amounts of Cyan, Magenta, and Yellow (CMYK), which determines which wavelengths are absorbed.
@@Hevlikn In reality, it's very hard to make coloured objects with CMY only because pigments and dyes are rarely perfect and that's why figurative painters always add some brown pigment to their palette (and sometimes more vibrant colours to emphasis a hue or a gradient). Same in the printing industry : for some very colour-accurate results, inks with special colours (like orange and green) are added to the classic CMYK. Finally, there also are metallic, fluorescent or iridescent pigments that can't really be mimicked by CMY-only.
This is actually known since ancient times. Genesis 1:3: And God said "Let there be light". And then God increased the levels of RGB to 255, 255, 255, and set transparency to 0.
Same, but unlike him I wasn't bathed in the light. I was viewing it on a screen that was taking up a relatively small amount of my visual real estate compared to the daylight-lit white background.
Did you know orange was just called red until society decided to name it as a different colour? It's actually named after the fruit. So you weren't wrong
@@Googaliemoogalie And before a language develops a generic yellow, people would say something was banana coloured (if they lived somewhere bananas were known). Before getting oranges from tropical places (still a rather long time ago), people would often compare to ginger hair, itself called red hair still today. Like "it was red, like Jimmy's hair".
@@jetison333 and and, even in places that have developed a green-word, sometimes green things are still called blue as a holdover. Like green traffic lights in Japan being "blue" (ao), despite there being a green-word now (midori). Looking that up to double check I was right, I learned the commonality is that it happens in compound words.
I'm colorblind and still really enjoyed this video. The strangest thing for me was when you said that Put-Put turned gray when he looked the same color as the original to me (which looked blue to my eyes, not purple). You are right that the colors you switched to in order to simulate colorblindness isn't exact as I could see what appeared (to my eyes anyway) to be a change in shade in several colors. Still, I did not see an actual color change when you switched from regular to colorblind. However, I agree that for a color-seeing person, your experiment better shows the experience of not being able to distinguish colors than looking at an image that just turns all reds a brownish color.
Im colourblind too. Simple red green and blue not too hard. Wen shades and hue starts to change like put put i just went with wat ever colour he said it was and try to see it.
@@wdym._. I am seeing it as purple too and I am not colorblind. I suspect this boils down to how the brain interprets the info received from the eyes. The interpretation varies slightly from one individual to another. Remember the black/blue vs gold/white dress controversy? I believe the same phenomenon happens here.
Brains affects also how do yoy see colors, it is not just a wave length. Brains try to "fix" non-white light to be "normal color", and it may fools you what color you are seeing. Some person have that "fixing" stonger than some other person (and it is dependant about tireness, mood and zillion other things also). There was few years ago a meme "what color (blue-black) this dress is?" Some people saw it as white-golden and it was because their brains thought "there must be blue light" and brains automaticly "fixes" it.
“These lights really are G bees knees.” I don’t know how he can make me want to congratulate him on a really clever line and punch him in the face at the same time.
As someone who has zero color vision, I still enjoyed this one! I learned quite a bit about how light and combining it works, and a couple of the demos even still worked for me (notably the whiteboard and the big set of stuff with the red(?) etch a sketch)!
That makes me think, a high power RGB flashlight might help people like you to distinguish colors, at least a bit... The "artificial" colors could still be a problem, but I think it should make life easier
Zero color vision? That's rare. If it's "zero" does that mean that red green and blue appeared same "color" to you when shown side by side? Also how did the yellow pixel looked like on that odd RGBY thing
Very interesting video! As a child, I was taught the good ol' red-yellow-blue colour wheel. As a digital artist, I've always had difficulty reconciling this with RGB channels in Photoshop, etc. This video has helped immensely in that regard; thank you for posting it!
It's complicated. Red yellow and blue are actually the primary colors of paint because paint doesn't generate light, it absorbs it. So paint is called "subtractive" while LEDs are "additive". To put it another way, you paint with not-cyan, not-red, and not-magenta. When you combine them all you get black, or muddy brown. Note that modern printers use cyan, yellow and magenta to produce the subtractive effect. But these pigments are layered on reflective paper, not mixed together as in paint. In other words, the rules vary depending on how you create the illusion of color.
@@richardryley3660 Exactly. That having been said, I always had trouble grokking the RGB colour system in the same way that I have done with pigmentation. I've more-or-less reconciled it by thinking of the two as separate systems - each for their respective environment. This video was helpful in marrying the two approaches on an intuitive level.
that was your brain, because you KNOW he is purple. somebody who never saw it under normal light would have seen it gray. and this makes discussing colours and researching colour vision very hard :)
During my stint as a colorblind low voltage electrician, I used a red/blue/white head lamp to determine which color wires were. Red light: red is bright, green is dark, brown is semi bright. Blue light: red is darkest, green is brightest, and brown is semi. Switch to white light to confirm. Easy peezy.
When I worked in a theatre, the LED lights that we used had separate phosphor-coated white LEDs along with the RGB diodes. The difference between RGB and RGBW is very noticeable, especially in a theatre setting where they are the only lights in use in the room.
@@Iamdebug And you use amber a lot in theatre, because the regular phosphor-coated LEDs produce a very cold white which is horrible for displaying skin tones. If you ever had a follow spot on an open filter in your face, you know what terrible colour that has.
@@Stoney3K Indeed. Usually the common and standard RGBWW+CW (Warm white + cold white) LED arrays use 2200K or 2700K warm white LEDs. They can be mixed with red+green to get an amber look with a good color spectrum, and they can also be mixed with cold white to get a more natural white. All my LED strips in the house is RGBWW+CW due to the fact that they can create regular daylight, warm incandescent light and color ambience. Works great.
@@NetExplorers Apparently they just work like a colorblindness filter. They don't expand the color wheel with more colors. Instead, it just makes certain colors easier to distinguish. I, however, am only very slightly deuter, and might be misrepresenting.
Nah you're just subconsciously accommodating for the purple light being shined on it If you didn't know it was purple before and was fully aware the light was purple, you'd believe you're looking at grey
I also find it really interesting how when you look at things in a monochromatic view (i.e., ONLY a red view), you say "This is red, this is a darker red", but my mind automatically assumes them as white, black, etc etc, as if the colour isn't there at all.
For the red/green color blind experience, a better way of lighting it would be to use monochromatic blue and monochromatic amber. I had a classmate that was R/G color blind in one eye after an accident when they were a kid. They described it as being more of a yellow-orange for anything red, yellow and green. Depending on how something was pigmented, greens tended to look like more of a drab olive in that eye. Someone I know who was colorblind at birth is actually an artist and mechanic. While he always makes sure to double check wiring with a multi-meter just to be sure, he generally does really well picking out the right ones based on intensity in comparison with other colors. The one art piece he gifted us was a 2-D carving of an x-mas tree that he had drilled to put lights through. Despite his limitation, he mixed up a green paint that looks almost exactly like the fir tree in our front yard.
@@dhawthorne1634 ah i see. i have a friend too who became colorblind from an accident but on both eyes. never really managed to find any info on how this can happen.
This was definitely interesting. Especially the shot with the suddenly-red etch-a-sketch. I now understand the importance of CRI in a way I never have before. Alec, I think you should take a look at my video "How the hell does color correction work??" ... specifically, the Google Doc that is linked to in the description. (I'd link it here, but then my comment will get stuck in the spam filter.) Most of the information on that document was provided by my subscribers - and it's info that I hadn't been able to find anywhere else. I also have another video coming soon about monitor color profiles. They are far more tricky to deal with than anyone realizes...
Fascinating aspect of our brains: They sometimes guess at colours. So for your smattering of objects, many of them red, being lit by purely blue light at 8:23 , because I am familiar with the etch-a-sketch, I saw it as slightly red. But aside from that, I would never have been able to guess which other objects were red, and your sudden addition of just a bit of red light was wild.
Literally taking notes like I'm in a lecture bc I'm a music photographer/videographer, and as soon as he made the red ink disappear I realized this video is a guide for practical effects in lighting
I want to know where that Putt-Putt comes from. I want one of these for my five-year old- she's getting into classic PC games!
4 года назад
@@veronicafromminneapolis597 The Pyjama sam games I found especially creative and clever, and the music in all the Humongous games is really good. (also looks like that plush is actually pretty rare... you'll probably have to keep checking ebay and other sites until it comes up)
numspacsym Heheheh, when I was a little kid, I thought that “pigment of the imagination” was the actual phrase! It made sense to me, in that I knew pigments were used to make colors, and thus images. :p
To simulate red/greem colorblindness, I'd recommend trying a combination of your Amber traffic light (monochromatic* between red/green) and blue LED light.
@@pizzablender, as a red-green colorblind person, red IS quite dark. It always annoys me that people insist on using red to mark important things, because it just doesn't stand out much to me.
Yeah try playing any traditional shooter with a minimap, in cod I can't tell where fired enemy bullets are on the map, in battlefront the minimap is useless for enemy tracking. Honestly it's made me a better player in a way, ps I'm green colorblind
This was so enlightening (pardon the pun) I had a fleece coat that was brown in full spectrum light but indoors with fluorescent or LED lights it was a greenish color and I never truly understood why. Now I do! Thank you for this wonderful video. :-)
I have a dodgy VGA cable connection on my monitor, so I've developed a reflexive stress reaction when an image on my monitor shifts all the way into magenta. Real cool video though
Flashbacks to playing PS2 with a bad component cable connection. Suddenly the track in GT4 would lose the blue color channel and I'd have to complete the race in green and magenta before I could wiggle the cable behind the TV.
I was working on a monitor once with a bad cable, and someone walked by and asked why the color was so screwed up. It didn't look super off to me, then I jiggled the cable and the red started working. It was a noticeable, but not huge difference to me... but to the normally sighted person it was a huge change!
This has steadily become my favourite RUclips channel. It's just so chilled out, and that outro music tickles the little part of my brain that thinks not all the aesthetics from the 70's were terrible. No idea why, but there you have it. Thanks for all the cool stuff you've made for us to relax to. In this day and age, anything that helps my mind find peace is something to be treasured.
The whole video was incredibly interesting. Thank you for that! But the biggest payoff was at the end with the color-blind demonstration. My grandfather was red-green color-blind and I never have been able to really understand what it would look like. Your demo finally made it click. I can't thank you enough for that
IIRC, the Wikipedia article on color blindness also has descriptions somewhere on the various forms of color blindness and some approximations of what each would look like. I found this rather interesting as well.
@@bridgetthewench you do realize, that we are all watching the same tri-chromatic RUclips video? It's not "some people see more wavelengths", it's "different peoples brains interpret ambiguous visual information differently". It's the black-blue/gold-white dress all over again.
as someone that works with color mixing LEDs for a living, i can say that 18:55 is missing an example... it is possible to balance RGB LEDs in a way that looks closer to white than what you've shown. in my experience with SMD 5050 RGB chips, green and blue at full power tends to output much stronger than red, so i can get a better looking white with blue at ~50%, green at ~70%, and red at full power, your exact percentages may vary as not all RGB chips were made in the same factory. also yes, color mixing with RGB LEDs will kind of be hit and miss with CRI accuracy, but giving RGB chips full power to produce its own "white" is like drinking unfiltered tap water from a garden hose.
I agree: that comparison shows that the mixed LEDs are not giving as pure a white as the other light, as can be seen by sampling the whites from both images. In fact, editing the image and shifting the tint a bit toward green and increasing the saturation makes the purple color (along with the wood) very close to the other image. I don't doubt that there are colors that are not rendered correctly by (properly mixed) 3-color LEDs, but I don't think this shows that -- at least not in the video. Perhaps the affect is stronger in real life, but then that might indicate that at least some of the issue is with the RGB capture.
@@renmaddox If you want to go down an internet rabbit hole like me, you can see lots of comparisons (from companies and users) of different secondary and tertiary colours under different types of LED lights, from RGB white to phosphor white to even more elaborate mixings. Warm white LEDs with a CRI in the high 90s still misrepresent turquoises, ambers, certain skin tones. Of course being aimed at photographers, knowing you need to change lights if a client comes in wearing certain gemstones or dresses is useful, but the difference is very subtle for day to day living for you and me.
there are some misconceptions in here about how RGB can reproduce all colours. it's actually not true that RGB can reproduce every colour the eye can see. this is what those weird "gamut" charts are meant to represent. essentially, if you can only control the ratio between three colours, then you can only produce colours within a triangular region on the gamut chart, and other colours outside are too saturated to be reproduced. if you had four colours, you can produce colours within a four-sided region on the gamut chart. I believe this was the intention of the quattron display. I don't fully understand why this happens tbh, my weak understanding is you cannot excite a single kind of cone cell without also exciting the other one. for example, if I choose a monospectral red LED and a monospectral green LED, the red will still activate the green cones a little bit, and the green will activate the red cones a little bit. so there is crosstalk between the channels that cannot be controlled colour theory is really weird and quite the rabbit hole.
@Zavier Alfretzie I've seen that too, though to me it didn't seem so novel, merely like looking at a very dim, deep red LED. The interesting thing is that since our eyes' reactions to wavelengths follow a curve, it doesn't just suddenly become zero outside the visible spectrum but in fact will often show a reaction (albeit an extremely weak one) slightly into the near IR or UV regions.
@@BrookNeese Because it offers more control. The effect can be set in three different levels instead of two and the change between them is more gradual. But more importantly, Windows 10's built in "night light" doesn't allow you to automatically turn itself off when you run certain applications (like Photoshop, or your favorite movie player for example), nor does it have functions like "disable for an hour" or "disable until sunrise".
the wall directly outside my old dorm room had a Grateful Dead "Deadhead" mural outlined in rainbow. When we held floor parties and put up lights that shifted through the rainbow, the mural literally looked like it was pulsating.
Yea I first discovered this camping when I bought one of those cheap RBP LED strips and used it to light the tent, when set to cycle through colours any brightly coloured objects drastically changed colour as seen in this video especially the "just a bit of red makes all the red pop" scene
Yet another video by TC that had me thinking, "Hmm, I already know most of this stuff but I'll watch it anyway," only to have my freaking mind blown less than halfway through the video. Awesome work!
He explained it a lil later. it’s purple because the white in the eyes are reflecting purple as well, and grey is just a darker version of white so in this case it’s just going to be a darker purple.. idk if that makes sense but yeah lmaoo
4:54 - *FINALLY!* I've been waiting so long for that monochromatic cube, staring at it in the background for a year. 😀 This was probably the best, clearest, most thorough version of this topic I've seen. I can only give the video one like counts with Google, but here's a few more anyway. 👍👍👍👍
I'm red-green colorblind and can only distinguish the "hidden" numeral on one or two of the standard color-blindness test plates. This I first learned when attempting to join the US Coast Guard in 1965; they told me not to bother with the Navy, either. I can distinguish red and green in large areas of color, but small ones, such as LED lights at any distance, look absolutely the same -- not white, but some "color" that could be either red or green! A funny feeling. Thanks for a good and entertaining demo of color vision!
8:51 Interesting thing that happened to me. Suddenly the etch a sketch in the corner looked more red to me then it did before. The other red objects still looked black or a dark grey, but that looked and continued to look slightly red even when the lighting continued to change. I'm not sure if it was just my brain latching onto it being red and making me see it as redder or what. Even going back in the video though it still looks black until it switched to the colour at 8:51.
Yeah, that's a thing that happens. They're experimenting with something like this to create "hyper colors" in movies by overloading your eyes on a certain color then removing it to make an afterimage in a different or even nonexistent color (apparently they have a developer's edition of Inside Out at Pixar on a special projector that does this)
"What color is this can of spray paint?" [Confidently guesses] Yellow! (Some time later) "That can of paint was yellow, by the way." My guessing powers prevail once more!
17:22 "When we look into photoshop we can see, that what looked grey to _us_ is actually fairly purple" Am I the only one who saw that very same shade of purple from the beginning?
When I was a kid I used to grab a magnifying glass and look the box-TV screen because I could see the little "three colored squares" that way. It was kinda fascinating.
That set of puzzles is a LOT easier to figure out if you've already taken a class in advanced color theory... as I discovered comparing my experience (without such a class) to a friend's experience (with such a class). XD
Yeoman International> That set of puzzles is a LOT easier to figure out if you've already taken a class in advanced color theory You just reminded me of a puzzle in _Safecracker_ which was a pain because how does the provided clue make someone think to use the wavelength of a color of light as the code? ¬_¬
By the way, you actually can't reproduce all colors with red, green and blue. This is because the eye's "color gamut" is a wierd shape (google it) that can't be covered by a triangle. So adding a fourth color to displays could actually help, but it should probably be cyan or a second shade of green.
6:11 note this is the *normalized* cone responses. In terms of the *absolute* cone response, that overlap point would be different. The peaks aren't (near) equal height as shown there. Also should clarify, that the spectral colors can only be done in approximation on an sRGB-targeting screen in an sRGB-targeting video. The *actual* colors would be more saturated than your screen can produce. - This is even going to be true for wide gamut screens. Spectral colors can't quite be reached there, unless you primaries are spectral (i.e. using something like a BT.2020 color space) and in that case you can *only* perfectly reach those primaries. All other spectral colors are still technically off limit (though far closer than what sRGB gives you)
Many moons ago I attended a prepress tutorial about the colour gamut, and the presenter used an effective way to represent the limitations of colour perception. Behind him was a whiteboard nearly the full width of the room. He drew a line through the middle of the board all the way from left to right. Pausing for effect, he said, "this represents the full frequency spectrum from ultra violet to infrared." Then he portioned off a segment inside that. "This represents what the human eye can see." Then he portioned off a considerably smaller chunk inside that. "This is what your CRT display can represent in RGB." (This is back in the day, l-o-n-g before LCD screens.) Pausing once more for effect, he then bisected the field yet again, saying, "And this is what can be represented in CMYK. And you wonder why you have so much trouble getting decent colour reproduction into your print images. The wonder to me is how much we CAN represent in CMYK, given the puny slice of the colour gamut it can represent." I've always remembered that. I'm old enough to not take for granted the fantastic colour reproduction that can be achieved today on a modern printing press, printing digital-to-plate.
Your channel has to be my favorite educational tech channel. You leave no stone unturned. I appreciate all of the hard work, you put into these videos. The research must be migraine inducing, sometimes.
I'm red/green colorblind woman (yes, it does happen, lol) and I've struggled to explain for years what it's like. Mostly I boil it down to seeing a whole lot of shades of brown. I struggle with both shades of most colors as well as pretty much everything from red to green unless the colors are super saturated. Especially in darker shades, red, orange, yellow, and green just all appear as shades of brown. Purple is a long time nemesis of mine, as well. It tends to look blue in darker shades or pink in lighter. In dim lighting all bets are out, lol, I ride the gray scale express then. Even throughout your video, I just had to trust you were telling me some of the colors correctly, lol. And a fun fact, I found out I was colorblind by continually failing color and shade tests miserably while in a college art program. I got sick of being badgered by my professors that I would never get a job in art while being moderate/severely colorblind, so I switched my major to business.
One of the problems with this sort of video is that your monitor, what else might be on the screen (giving other color context) as well as your particular color vision can make things appear differently than how I see them. For maximum effectiveness on the gray-looking body, you'll want the video to be full-screen. And, to me at least, he looks the most intensely grey in the low shot where you can see his tongue.
@@2madrobot If I pause and then stare at his... "nose" for a few seconds, the color fades (not quite completely, still looks a little purple). Maybe try that.
@@TechnologyConnections Upon sticking my phone screen right up to an eye I can see what you were saying. It did indeed begin to appear monochromatic. I think you should probably add some annotation to that section saying that for maximum effect the display should take up the majority of your vision. I think a fair few people are probably similarly confused by it.
Just a genuine observation- the low shot is when he looks the MOST purple to me! That being said, every winter I argue with my boyfriend about whether my coat is dull green or grey (it's faded, but green thankyouverymuch).. so it's maybe my/our color vision distinguishing whats IN grey?
This was a fantastic video, and now I want to play with colored lighting on camera, too. I've always enjoyed the effect you get from aiming two color lights at an object from different angles to get a relatively normal looking object but with colored shadows.
I have protanomaly, a type of red-green colourblindness, and despite this, throughout most of this video, I have agreed with most points; The red in the ship comparison looked darker, but that was it, until you brought out Tug Tug. Very interestingly, at 16:44, to me at least, Tug Tug doesn't look gray at all! He looks more like a purplish-blue. In fact, Tug Tug at 16:25 looks _more_ gray that at 16:44! This is super fascinating to me, and I wonder why?...
I love how the humor in this is so subtle, and gentle, yet still manages to make me chuckle. Also, my mind has officially been blown, and I'm at only around the 5 minute mark.
I'm surprised you didn't run into any fluorescent pigments. When I played around with RGB lighting, I found some things would light up green under blue light, and many things would light up orange under either green or blue.
I wanted to know specifically which one was which under the red light but it was mostly a joke. I understand the point was you just can not really tell.
I once wrote a new song's lyrics, in red, and stuck it to the stage foldback. Song starts, looks down, nothing, Red stage lights. Proceeds to sing first verse three times. No one noticed. Never did that again. Terrifying.
One of the reasons why lighting in purely virtual environments (rendering for movies, architectural illustration, games) is really hard to pull of if it becomes any more complex. Want to see what the reflection of a red ball on a green wall looks like? Well - most textures are encoded in some sort of RGB and will Not give you a good or even decent result. We really need a more powerful way of encoding color, something like a 8 value color spread over the spectrum maybe? That could still nto reproduce such strange effects like pumpkin seed oil.
I find it interesting that the human eye is most sensitive to the blue, green, and greenish-yellow spectrums of light, and what do we see at the beginning of the video: a blue light with a little blue and a lot of white spots at the bulbs, a green light with a little blue and a lot of white spots at the bulbs, and a red light with a lot of YELLOW and eventually a little white spots at the bulbs. Perhaps because the red spectrum of light is more interpretive than green or blue, so the colors we are most sensitive to appear first (blue and yellow), and since we are less sensitive to red light it takes longer for the red color to bleed through with all the other colors and produce white. That's so cool! Also at 16:51 every time you say "grey" I actually see purple. But if I focus really really hard, I can convince myself it's grey and it's like it changes color. And my eyes hurt.
![Noob To Max With DRAGON REWORK In Blox Fruits [FULL MOVIE]](http://i.ytimg.com/vi/LnBMOinoOvA/mqdefault.jpg)
"Oh, sorry, this one is monochromatic, let me get that out of there"
That caught me completely off guard.
Almost choke on that one
Same, lol
I just rewatched the video and I remembered one of them was mono. I was trying so hard to figure out which one it was and I picked wrong. That was the weirdest feeling ever when I realized I was wrong
A regular M. Night Shyamalan.
It completely snapped me.
The _length_ of _sigh_ I released when you said "RG-bees knees..."
That was the absolute worst. Of all time.
I feel like I need to make a special trophy for just how absolutely terrible it was. Like, legitimately, literally *absolutely*.
I honestly don't think you can get worse than that one. We'd need to recalibrate the core tenets of groan science if one was ever discovered.
OH GOOD LORD I TAKE IT BACK! That grayscale Rubicks cube! The foundation of groan science has been rocked to the core!
The small chuckles echoing around the world because of it.
It's better than that
"R G B's knees"
"Are the bee's knees"
Thats bravery,telling the jokes that need to be made.
"What color is this?"
"...orange-"
"That's right: it's red!"
"-red!"
Hyreia same XD
Saame
the fuq xD
100th like
same
"Anyway, let's take a look at our old friend, Putt-Putt."
I felt like I suddenly went from watching Technology Connections to having a fever dream.
colorblind people really must have a love/hate relationship with this video.
You don't even know. I didn't even know what he was talking about half the time yet I was able to really show my family what it feels like to not be able to tell colors apart.
v2_ I have no red cones so everything is broken
I have mild color blindness and i was thinking "so that's gow i see colors" at the end where he shows what it is lile for color blinds.
Can confirm.
I'm blue/yellow colorblind and I'm having trouble telling things apart.
Yep. This is an interesting one.
That monochromatic Rubik’s cube got me laughing so hard. Good one!
And it was a great prop for realising just how skewed our perception is without a good spectrum of light! It wouldn't have crossed my mind to think they'd look the same
It made me smile because I was sure I'd worked out which parts of it were orange.
@@AdvancePlays it looked more realistic than the colored one 😂
It's kinda trippy for me, when the white light got restored... for me it looks like the monochromatic one has zero color at all. Like Spider-Man Noir.
Satan likes
16:55 17:05 17:25 17:51 every time he says "...just grey" I see a clear purple
Probably it looked grey in person
@@zsigio6114 no, it didn't. otherwise he would have noticed while editing. people perceive colors differently. more specifically people perceive colors obscured by shade differently. it's the same thing as with The Dress of 2015.
Might have to do with the brightness of the room you are in. Try watching it in a dark room.
lul, if you were colorblind you would actually still see grey dummy so its probably your monitor
I was thinking the same but in my notebook indeed looks grey
Favorite line of the day.
"Here's a different kind of color, a GameBoy Color."
"Oh this one's actually monochromatic, let me get that outta here..."
I REALLY got a kick out this. If anyone somehow wasn't following your point, this would INSTANTLY drive it home. As someone who has studied the psychology of learning, I must applaud.
I don't get it
Yeah. Like everything seems just grayscale under monochromatic light. After some time when your eyes adapt to the monochromatic light, every single color just seems like shade of gray. You don't even see the color, because your white balance just shifts towards red (or whatever that monochrome color is). Being able to see only one color is very limiting. However that representation isn't quite realistic depiction of how colorblind people with achromatic vision see the world around them. You're filtering out just single wavelength, which first of all creates very limited color palette, and then your eyes take that as white balance point, so you get adjusted to a new light. In this situation, the other two colors gets filtered out, which means those colors (and colors that do not contain the lighting color) appear solid black. That's not how achromatic vision works and looks like. Achromatic vision is complete loss of color vision, which means your cones eighter don't work or are completely missing. Therefore you can only percept brightness, such you cannot see any color. Everything appears the same color, which is best represented as grayscale (everyone has slightly different vision). You cannot tell that such person is seeing in grayscale. In reality, he doesn't really know how colors look like, he doesn't know what gray actually is. He has no means to compare different colors, everything is the same color to him. There are no colors filtered out, that person just has no means to receive informations about colors. Best representation is Photoshop's "grayscale" filter which averages colors based on their relative brightness to other colors. This is effectively best approximation, yet still not perfect. In reality, we don't really know.
I _was_ following the point, but that actual, very clear demonstration still brought my understanding to a whole new level.
@@joeyknight8272 you should have watched the video its really good.
@@simonl7784 I will
I bet he smiled so hard when placing that monochromatic rubic's cube on the table.
That one made me chuckle. Don't you just hate it when you get your monochrome and color Rubik's cubes mixed up? Happens all the time.
LOL. Yeah. That was an inspired move.
I laughed out loud.
TravisTev rubix*
@@aspol12 Official spelling: www.rubiks.com/en-us/
youneedacomputer2005 Just don't even try to correct it if you're a non cuber
I'm sure there are lots of things in this video that you already knew, but I hope that the things you see here help to provide you with a deeper understanding. In other words, I hope I was able to shine a new light on an ever-interesting topic!
Oh so many colors
isn’t the part of the rubiks cube still showing green when there is no more light due to luminescence (the color light energy gets absorbed and when no more light is present it radiates the absorbed energy back) , it is one of the reasons we can still see some shapes even in almost pure darkness when for instance a basement light turns off)
Maybe you could make a video on color gamuts, and the reason why a real four-color screen (not Sharp's gimmicky and dishonest Quattron) might really enable it to display a wider range of colors.
How about the people who have FOUR basic colors? en.wikipedia.org/wiki/Tetrachromacy#Humans
I watched and saw your correction to say the ink appeared a little blue but I'm going to comment and say you said it turned black while lit by blue just because I can. I feel left out when all the people who don't watch before commenting get to yell at you but I don't.
Actually that "grey" looked pretty purple to me.
On an odd tangent, I watched this with my husband. He too saw it as grey but I insisted I saw a faint purpley-grey rather than a flat out grey. Even when I covered most the image to account for the bias of the brighter whites influencing me... I saw a dull purple shade.
Remember how he mentioned violet is at the very edge of our visual color spectrum? Females have been known to see into the violet spectrum further than their male counterparts. Females also have the ultra rare possibility of having a special kind of "color blindness" that allows them to see ultra violet light. My guess would be you were most likely born female and can see a glimpse into the edge of our visual spectrum where Alec can not.
@@clueless_cutie Nope I'm a dude lol
Edit: was
Yeah, I saw the purple too. Also, a dude. I think this is one of those things coming from white-balance. Kinda like that blue/gold dress that went viral a few years ago. My guess is he saw it as grey, but it looked clearly purple to me as well.
@@clueless_cutie " Females have been known to see into the violet spectrum further than their male counterparts. Females also have the ultra rare possibility of having a special kind of "color blindness" that allows them to see ultra violet light."
That is neat, but its not really relevant here since its an RGB video. There isn't any violet or ultraviolet in the image cause the shortest wavelength coming off the display is blue.
Not just pretty purple for me, supes purple. Probably variation in the peaks of our green and red cone spectrum graphs. Mine may be further apart than those who see grey.
“There is nothing wrong with your television set. Do not attempt to adjust the picture.”
The Outer Limits was in monochrome, so there was less to fool with.
(Except vertical and horizontal hold. It's amazing to look back and realize those early sets were so primitive and sloppy they needed adjustment at times, even though the signal had all the necessary sync information to do it automatically.)
SDWNJ is that a Local 58 reference?
We control the vertical and horizontal
*WE ARE CONTROLING YOUR TELEVISION SET*
"We control the Rods, *AND* the Cones."
"What color is it"
Me: Orange
"Well, you're probably thinking red."
Me: *sweats nervously*
haha. I'm in danger
me
This has already been posted 1 month before
@@cameronlau Except this one has a different context; he's worried that he's colorblind while the other was just correcting what he picked
swok Your pfp shows it very well
"what color is this?"
- ..orange
"well red of course!"
- whatt...
"If I add red it really turns grey"
Uh no I can see the purple just fine...
9:02 all the red objects are now black:
Me: The etch-a-sketch is still red.. How does that happen without any red light?
"Watch as this red writing disappears under red light."
*[Godot has left the server]*
@@Carewolf from my understanding it's your brain being able to distinguish the blue and green channels from the reflection of the etch a sketch and determining that color as red. This is just a guess, but it's my best one
Carewolf probably because you know what colour an etch-a-sketch is and your brain is using that to inform what you perceive.
5:32 note that rods don't just 'detect brightness', they are in essence a chromatic sensor just like the cones (centered around 500 nm which is turquoise), just not used by the brain as such. So the brain detects brightness through rods, and detects colors through cones. And because rods aren't overall brightness sensors (but rather what a blue/green cone would be), that causes you to lose red vision at night and other low light conditions. Hence why we associate a blue hue, low brightness image with night time.
"...that causes you to lose red vision at night and other low light conditions." Would this also be why I've seen astrophotographers and astronomers use red LEDs when they're stargazing?
@@ThomasFerguson22 the quoted phenomenon is named "Purkinje effect" (see Wikipedia article). As for why people use red lights at night (i've seen some urban explorers with red headlights): receptors that control pupilary light reflex are even more blue-shifted than rods: 480 nm versus 500 nm for rods. If you're interested, the name is "Intrinsically photosensitive retinal ganglion cells" (also on Wikipedia).
This is why it's recommended to wear blue instead of black to hide in the dark.
@@DemstarAus Wouldn't that stimulate the rods more than black would?
Unless you're hiding in a 100 percent dark room or the eldritch abyss, anything black would ironically stand out in low light conditions. Black is rarely found in most environments; grass is not black, trees are not black, houses, hallways and buildings are not black.
“What colour is this?”
Oh it’s oran-
“It’s red, of course!”
O-oh...
xD me too
Same
same
same
Well guess I'm color blind
4:53
okay its hard to argue when i was convinced i was looking at 2 colored rubik's cubes
good demonstration
Totally got me with the left Rubik's cube... And I stopped the video and was guessing the colors like a complete tool. xD
The differences between a "real" white light and a "composite" white light comprised of monochromatic red/green/blue added together, was completely fascinating to me! It had never occurred to me that there would be a difference. Can't wait for the video on your other channel to learn more about it.
I'm still having a hard time wrapping my head around it, because I was taught that what we perceive as white is the combination of the colors of the spectrum. "Monochromatic white" sounds like a contradiction in terms to me.
get your self a floor lamp with 3 sockets and get your self a red party bulb a green one and a blue one focus them into a composite white light(preferably on a white surface) then stand in front of it... rainbow shadows
I bought a RGB light strip as a bias light for my TV. Didnt look nice at all and I got a RGBW strip instead.
@@joesterling4299 It's worth noting that light is a spectrum; monochromatic refers to a very narrow wavelength. Photons are only produced at certain wavelengths (which is how we determine the composition of stars), and different pigments can have different reflective/absorptive/or re-emission spectra. When presented with a narrow wavelength, a pigment can only reflect a narrow wavelength. Our vision is receptive to all wavelengths, and determines the wavelength based on the intensity of light received after it has been filtered by the cone. As TC mentioned, artificial white light is replicating a broad spectrum through an averaged stimulation of three narrow spectra. This means that the pigment interactions at any wavelength outside of these won't be realised.
Similarly, think about how making coloured lights differs from making coloured objects. An objects colour can be created by adding varying amounts of Cyan, Magenta, and Yellow (CMYK), which determines which wavelengths are absorbed.
@@Hevlikn In reality, it's very hard to make coloured objects with CMY only because pigments and dyes are rarely perfect and that's why figurative painters always add some brown pigment to their palette (and sometimes more vibrant colours to emphasis a hue or a gradient). Same in the printing industry : for some very colour-accurate results, inks with special colours (like orange and green) are added to the classic CMYK. Finally, there also are metallic, fluorescent or iridescent pigments that can't really be mimicked by CMY-only.
This is actually known since ancient times.
Genesis 1:3: And God said "Let there be light". And then God increased the levels of RGB to 255, 255, 255, and set transparency to 0.
God's not a programmer! God is a DJ!
Close enough. Our sun is white so that's why we see the colours we see
"Let there be light! And there was light. It was good. Damn good!" Just think, and ponder: Originally there was no light and no sound.
@@kitemanmusic sp?
kitemanmusic It is pretty fascinating to think about
PuttPutt:
Every time you said it was grey, I saw purple.
Same for me !
make sure you didn't swap your orange juice for LSD again John. come on mannnn.
Same for me. ³
Same, but unlike him I wasn't bathed in the light. I was viewing it on a screen that was taking up a relatively small amount of my visual real estate compared to the daylight-lit white background.
same
3/4 into the video I just realized I'm watching with "low blue light" mode on...
awww shit me too
Wait same
oh wait i finished it and didn't realize that
oh well, time to watch it again
Fuck, same.
Thanks for telling. Gotta watch it again
"What colour is this?"
Me: Orange
"That's right, it's red!"
:/
Did you know orange was just called red until society decided to name it as a different colour? It's actually named after the fruit. So you weren't wrong
@@Googaliemoogalie And before a language develops a generic yellow, people would say something was banana coloured (if they lived somewhere bananas were known). Before getting oranges from tropical places (still a rather long time ago), people would often compare to ginger hair, itself called red hair still today. Like "it was red, like Jimmy's hair".
@@kaitlyn__L and before that, and in fact still in some languages, the word for blue and green was the same.
I thought the same!!!
@@jetison333 and and, even in places that have developed a green-word, sometimes green things are still called blue as a holdover. Like green traffic lights in Japan being "blue" (ao), despite there being a green-word now (midori). Looking that up to double check I was right, I learned the commonality is that it happens in compound words.
I'm colorblind and still really enjoyed this video. The strangest thing for me was when you said that Put-Put turned gray when he looked the same color as the original to me (which looked blue to my eyes, not purple). You are right that the colors you switched to in order to simulate colorblindness isn't exact as I could see what appeared (to my eyes anyway) to be a change in shade in several colors. Still, I did not see an actual color change when you switched from regular to colorblind. However, I agree that for a color-seeing person, your experiment better shows the experience of not being able to distinguish colors than looking at an image that just turns all reds a brownish color.
Im colourblind too. Simple red green and blue not too hard. Wen shades and hue starts to change like put put i just went with wat ever colour he said it was and try to see it.
Im not colorblind but when he said that put put turned grey I couldn't see it I was seeing purple and I didn't get it why he said that it was grey
@@wdym._. I am seeing it as purple too and I am not colorblind. I suspect this boils down to how the brain interprets the info received from the eyes. The interpretation varies slightly from one individual to another. Remember the black/blue vs gold/white dress controversy? I believe the same phenomenon happens here.
Brains affects also how do yoy see colors, it is not just a wave length. Brains try to "fix" non-white light to be "normal color", and it may fools you what color you are seeing. Some person have that "fixing" stonger than some other person (and it is dependant about tireness, mood and zillion other things also). There was few years ago a meme "what color (blue-black) this dress is?" Some people saw it as white-golden and it was because their brains thought "there must be blue light" and brains automaticly "fixes" it.
I’m not colorblind and when he said it looked grey, it still looked purple. It might be a flaw in the way he himself sees color.
Pour yourself a bowl of fruit loops and set an RGB strip to slowly color cycle.
God it's like a bootleg acid trip.
Just like the old Amiga tech demo days 😊
I am 100% doing that tomorrow
Brother
this guy rgbs
“These lights really are G bees knees.”
I don’t know how he can make me want to congratulate him on a really clever line and punch him in the face at the same time.
I know right? I want to give him a round of applause but put his head between my hands while doing so.
these lights really r g b's knees
@@tredI9100 Thanks, now I get it.
I guess that's why they call it a punch line...
Could you please explain the joke for a not native speaker?
As someone who has zero color vision, I still enjoyed this one! I learned quite a bit about how light and combining it works, and a couple of the demos even still worked for me (notably the whiteboard and the big set of stuff with the red(?) etch a sketch)!
"colors dont exist!! WAKE UP SHEEPLE!!!!1" - colorblind man
Yes, the etch a sketch was red.
That makes me think, a high power RGB flashlight might help people like you to distinguish colors, at least a bit... The "artificial" colors could still be a problem, but I think it should make life easier
Zero color vision? That's rare. If it's "zero" does that mean that red green and blue appeared same "color" to you when shown side by side? Also how did the yellow pixel looked like on that odd RGBY thing
Really, zero color vision? As in, you can’t see any colour at all? Because achromatopsia is quite rare.
Very interesting video!
As a child, I was taught the good ol' red-yellow-blue colour wheel. As a digital artist, I've always had difficulty reconciling this with RGB channels in Photoshop, etc. This video has helped immensely in that regard; thank you for posting it!
It's complicated. Red yellow and blue are actually the primary colors of paint because paint doesn't generate light, it absorbs it. So paint is called "subtractive" while LEDs are "additive".
To put it another way, you paint with not-cyan, not-red, and not-magenta. When you combine them all you get black, or muddy brown. Note that modern printers use cyan, yellow and magenta to produce the subtractive effect. But these pigments are layered on reflective paper, not mixed together as in paint.
In other words, the rules vary depending on how you create the illusion of color.
@@richardryley3660 Exactly. That having been said, I always had trouble grokking the RGB colour system in the same way that I have done with pigmentation. I've more-or-less reconciled it by thinking of the two as separate systems - each for their respective environment. This video was helpful in marrying the two approaches on an intuitive level.
When you got to the part with Putt-Putt and you were calling him gray, I'm just going, "the body looks purple to me..."
In real colors Putt-Putt is so much greater.
Yes, I suspect people may respond to this the same as white&gold vs blue&black dress.
Exactly I thought I was going crazy
I didn't see any gray either, he was just purple...
that was your brain, because you KNOW he is purple. somebody who never saw it under normal light would have seen it gray. and this makes discussing colours and researching colour vision very hard :)
There's a teacher somewhere using this in his science class
as they should, alec truly knows his stuff.
*looks around nervously in a teacherly fashion*
and the the class riots at the rgb’s knees pun and the monochrome Rubix cube
I will! It’s a great explanation and also uses equipment that is unavailable in most schools! Great video!
I literally just recommended it to one of my teachers xD
As a light designer to always found this interesting. It gets even weirder when you throw in the UV with colors as well.
This puts the phrase "Don't always trust your eyes" to a whole another level.
The scientific explantion of it
255 likes what a coincidence
During my stint as a colorblind low voltage electrician, I used a red/blue/white head lamp to determine which color wires were.
Red light: red is bright, green is dark, brown is semi bright.
Blue light: red is darkest, green is brightest, and brown is semi.
Switch to white light to confirm.
Easy peezy.
Where was this when everyone on the internet was losing their collective minds over what color that dress was?
it was blue and brown, its still blue and brown, i'll fight anybody who says its anything else
@@blew1t it was blue and black
@@riba2233 clearly black and gold, y'all are crazy 😂
Teal and magenta! At least after photoshop...
Obviously the dress was Laurel and Yanny.
When I worked in a theatre, the LED lights that we used had separate phosphor-coated white LEDs along with the RGB diodes. The difference between RGB and RGBW is very noticeable, especially in a theatre setting where they are the only lights in use in the room.
The alternative to that being RGBAW lights as it's quite hard to reproduce amber without filters.
@@Iamdebug And you use amber a lot in theatre, because the regular phosphor-coated LEDs produce a very cold white which is horrible for displaying skin tones. If you ever had a follow spot on an open filter in your face, you know what terrible colour that has.
I tried using an RGB light strip as a bias light for my tv. The RGBW option was a lot better.
@@Stoney3K Indeed. Usually the common and standard RGBWW+CW (Warm white + cold white) LED arrays use 2200K or 2700K warm white LEDs. They can be mixed with red+green to get an amber look with a good color spectrum, and they can also be mixed with cold white to get a more natural white. All my LED strips in the house is RGBWW+CW due to the fact that they can create regular daylight, warm incandescent light and color ambience. Works great.
RGBW has also become quite common in residential lighting.
This video is actually helping me understand how colorblind people can "see" their missing colors with Enchroma glasses.
And today I learned that Enchroma glasses exist.
@@PsychadelicoDuck me too
I'm a red-green colorblind person, I want these glasses so damn much but they're too expensive lol
@@NetExplorers Apparently they just work like a colorblindness filter. They don't expand the color wheel with more colors. Instead, it just makes certain colors easier to distinguish. I, however, am only very slightly deuter, and might be misrepresenting.
@@NetExplorers spot the odd one out 🍎🍎🍎🍎🍎🍎🍎🍎🍏🍎🍎🍎🍎
16:57
TC: "Looks gray"
Me: "I have purple superpowers."
Haha I feel you
I thought so too. It looks really vibrantly purple.
me too
Nah you're just subconsciously accommodating for the purple light being shined on it
If you didn't know it was purple before and was fully aware the light was purple, you'd believe you're looking at grey
@@spartanwar1185 I don't think so - I think the divide is similar to the divide with "the dress"
UV light is also interesting.
Pro tip, do NOT illuminate your toilet with UV light.
or your bed, at least you should be expecting some stains in the bathroom :D
Hopefully if you clean it properly the whole thing will light up ;)
Or your computer chair.
Oh shit, oh shit, it's like a Jackson Pollock paint!
I also find it really interesting how when you look at things in a monochromatic view (i.e., ONLY a red view), you say "This is red, this is a darker red", but my mind automatically assumes them as white, black, etc etc, as if the colour isn't there at all.
For the red/green color blind experience, a better way of lighting it would be to use monochromatic blue and monochromatic amber. I had a classmate that was R/G color blind in one eye after an accident when they were a kid. They described it as being more of a yellow-orange for anything red, yellow and green. Depending on how something was pigmented, greens tended to look like more of a drab olive in that eye.
Someone I know who was colorblind at birth is actually an artist and mechanic. While he always makes sure to double check wiring with a multi-meter just to be sure, he generally does really well picking out the right ones based on intensity in comparison with other colors. The one art piece he gifted us was a 2-D carving of an x-mas tree that he had drilled to put lights through. Despite his limitation, he mixed up a green paint that looks almost exactly like the fir tree in our front yard.
what kind of accident makes someone colorblind but only in one eye?
@@DANKKrish I intentionally left that detail out.
@@dhawthorne1634 ah i see. i have a friend too who became colorblind from an accident but on both eyes. never really managed to find any info on how this can happen.
"Magenta Mess" sounds like a band you would have snuck out of your parents house in high school to go see in the 90's-early 2000s
This was definitely interesting. Especially the shot with the suddenly-red etch-a-sketch. I now understand the importance of CRI in a way I never have before.
Alec, I think you should take a look at my video "How the hell does color correction work??" ... specifically, the Google Doc that is linked to in the description. (I'd link it here, but then my comment will get stuck in the spam filter.) Most of the information on that document was provided by my subscribers - and it's info that I hadn't been able to find anywhere else.
I also have another video coming soon about monitor color profiles. They are far more tricky to deal with than anyone realizes...
Hey taran
Woah, nice seeing you here :D
The Etch-A-Sketch always looked red to me, even in the blue-only light. Just me?
The etch-a-sketch is kinda sussy tho
1:37 "yes, these lights really are gee bee's knees"
*closes video in disgust*
*stares at desktop for 15 seconds*
*reopens video*
Fascinating aspect of our brains: They sometimes guess at colours. So for your smattering of objects, many of them red, being lit by purely blue light at 8:23 , because I am familiar with the etch-a-sketch, I saw it as slightly red. But aside from that, I would never have been able to guess which other objects were red, and your sudden addition of just a bit of red light was wild.
That's the most useful dead pixel screen diagnostic program I know of...
“RGB’s knees”
Dear Lord I strive for this punnage
Literally taking notes like I'm in a lecture bc I'm a music photographer/videographer, and as soon as he made the red ink disappear I realized this video is a guide for practical effects in lighting
*places plush Putt-Putt on the table*
You had my curiosity, now you have my attention.
thekraken8him PBG Has entered the chat
And you have my axe!
...
Wait, no. That doesn't make sense.
I want to know where that Putt-Putt comes from. I want one of these for my five-year old- she's getting into classic PC games!
@@veronicafromminneapolis597 The Pyjama sam games I found especially creative and clever, and the music in all the Humongous games is really good. (also looks like that plush is actually pretty rare... you'll probably have to keep checking ebay and other sites until it comes up)
So you’re saying that... purple and magenta are pigments of our imagination?
numspacsym Heheheh, when I was a little kid, I thought that “pigment of the imagination” was the actual phrase! It made sense to me, in that I knew pigments were used to make colors, and thus images. :p
*_AAAAAAAAARRRGGHHHHHHHHHHHHhhhhh.................._*
@@tookitogo imagination comes from image
Yes of c--
wait
WHY YOU LITTLE #$@!
xD
get. out.
To simulate red/greem colorblindness, I'd recommend trying a combination of your Amber traffic light (monochromatic* between red/green) and blue LED light.
I thought that toon, but then red may still be very dark. But at least it can look like a 'white' white balance.
@@pizzablender, as a red-green colorblind person, red IS quite dark. It always annoys me that people insist on using red to mark important things, because it just doesn't stand out much to me.
GREEM
Yeah try playing any traditional shooter with a minimap, in cod I can't tell where fired enemy bullets are on the map, in battlefront the minimap is useless for enemy tracking. Honestly it's made me a better player in a way, ps I'm green colorblind
I also almost went through a stop sign once and the only thing that stood out was the white reflective border
This was so enlightening (pardon the pun) I had a fleece coat that was brown in full spectrum light but indoors with fluorescent or LED lights it was a greenish color and I never truly understood why. Now I do! Thank you for this wonderful video. :-)
This was really just a 22 minute video telling people to go outside.
4:54: the unexplained, unaddressed monochrome I really fascinating and really evil. I love it.
I have a dodgy VGA cable connection on my monitor, so I've developed a reflexive stress reaction when an image on my monitor shifts all the way into magenta. Real cool video though
Flashbacks to playing PS2 with a bad component cable connection. Suddenly the track in GT4 would lose the blue color channel and I'd have to complete the race in green and magenta before I could wiggle the cable behind the TV.
Just, replace it? VGA or d sub cables are dirt cheap
Don't replace... remove. VGA should die :)
I was working on a monitor once with a bad cable, and someone walked by and asked why the color was so screwed up. It didn't look super off to me, then I jiggled the cable and the red started working. It was a noticeable, but not huge difference to me... but to the normally sighted person it was a huge change!
Not the cable, the port.
This has steadily become my favourite RUclips channel. It's just so chilled out, and that outro music tickles the little part of my brain that thinks not all the aesthetics from the 70's were terrible. No idea why, but there you have it. Thanks for all the cool stuff you've made for us to relax to. In this day and age, anything that helps my mind find peace is something to be treasured.
The whole video was incredibly interesting. Thank you for that! But the biggest payoff was at the end with the color-blind demonstration. My grandfather was red-green color-blind and I never have been able to really understand what it would look like. Your demo finally made it click. I can't thank you enough for that
IIRC, the Wikipedia article on color blindness also has descriptions somewhere on the various forms of color blindness and some approximations of what each would look like. I found this rather interesting as well.
This video was a thought biscuit
"it looks gray" idk looks pretty purple to me,,
Same! Some people can see more wavelengths of color than others, so it's possible that's what's going on there.
Yeah I was confused too
@@bridgetthewench you do realize, that we are all watching the same tri-chromatic RUclips video? It's not "some people see more wavelengths", it's "different peoples brains interpret ambiguous visual information differently". It's the black-blue/gold-white dress all over again.
Yeah. Everything in the picture is varying shades of purple, so it behaves like a grayscale image, but it's still purple.
@@bridgetthewench no it isn't that. Its probably the camera, compression, and the scared combined end up messing the colors (oversimplyfied)
as someone that works with color mixing LEDs for a living, i can say that 18:55 is missing an example... it is possible to balance RGB LEDs in a way that looks closer to white than what you've shown. in my experience with SMD 5050 RGB chips, green and blue at full power tends to output much stronger than red, so i can get a better looking white with blue at ~50%, green at ~70%, and red at full power, your exact percentages may vary as not all RGB chips were made in the same factory.
also yes, color mixing with RGB LEDs will kind of be hit and miss with CRI accuracy, but giving RGB chips full power to produce its own "white" is like drinking unfiltered tap water from a garden hose.
I agree: that comparison shows that the mixed LEDs are not giving as pure a white as the other light, as can be seen by sampling the whites from both images. In fact, editing the image and shifting the tint a bit toward green and increasing the saturation makes the purple color (along with the wood) very close to the other image.
I don't doubt that there are colors that are not rendered correctly by (properly mixed) 3-color LEDs, but I don't think this shows that -- at least not in the video. Perhaps the affect is stronger in real life, but then that might indicate that at least some of the issue is with the RGB capture.
@@renmaddox If you want to go down an internet rabbit hole like me, you can see lots of comparisons (from companies and users) of different secondary and tertiary colours under different types of LED lights, from RGB white to phosphor white to even more elaborate mixings. Warm white LEDs with a CRI in the high 90s still misrepresent turquoises, ambers, certain skin tones. Of course being aimed at photographers, knowing you need to change lights if a client comes in wearing certain gemstones or dresses is useful, but the difference is very subtle for day to day living for you and me.
I imagine the effect also shows up differently in different pigments
I've always been pretty confused about how RGB works and the comparison to the human eye, and this was a perfect explanation of how it works.
there are some misconceptions in here about how RGB can reproduce all colours. it's actually not true that RGB can reproduce every colour the eye can see. this is what those weird "gamut" charts are meant to represent. essentially, if you can only control the ratio between three colours, then you can only produce colours within a triangular region on the gamut chart, and other colours outside are too saturated to be reproduced. if you had four colours, you can produce colours within a four-sided region on the gamut chart. I believe this was the intention of the quattron display.
I don't fully understand why this happens tbh, my weak understanding is you cannot excite a single kind of cone cell without also exciting the other one. for example, if I choose a monospectral red LED and a monospectral green LED, the red will still activate the green cones a little bit, and the green will activate the red cones a little bit. so there is crosstalk between the channels that cannot be controlled
colour theory is really weird and quite the rabbit hole.
@Zavier Alfretzie I've seen that too, though to me it didn't seem so novel, merely like looking at a very dim, deep red LED. The interesting thing is that since our eyes' reactions to wavelengths follow a curve, it doesn't just suddenly become zero outside the visible spectrum but in fact will often show a reaction (albeit an extremely weak one) slightly into the near IR or UV regions.
Linus Media Group needs this as required viewing. They try to RGB everything.
Richard Reavis haha, I was thinking something very similar.
You know what else is required? PRIVATE INTERNET ACCESS! Click the link in the description below to learn more.
someone ignored all the stealth builds
@@theodiscusgaming3909 Hahahahahahaha
Probably part of the required viewing might be a lesson on how not to auction something they don't own
Just a friendly reminder: turn off f.lux for this video.
FRIENDLY JAPANESE BUSINESSMAN blue light filters
Who even uses that anymore in 2019. Doesn't every OS have that built in nowadays?
@@BrookNeese Windows 7 FTW!
btw Win7 still has over 20% in the latest steam survey.
@@BrookNeese Because it offers more control. The effect can be set in three different levels instead of two and the change between them is more gradual. But more importantly, Windows 10's built in "night light" doesn't allow you to automatically turn itself off when you run certain applications (like Photoshop, or your favorite movie player for example), nor does it have functions like "disable for an hour" or "disable until sunrise".
Gotta play devils advocate here, maybe you shouldnt be on a screen if you cant handle it keeping you awake?
the wall directly outside my old dorm room had a Grateful Dead "Deadhead" mural outlined in rainbow. When we held floor parties and put up lights that shifted through the rainbow, the mural literally looked like it was pulsating.
Yea I first discovered this camping when I bought one of those cheap RBP LED strips and used it to light the tent, when set to cycle through colours any brightly coloured objects drastically changed colour as seen in this video especially the "just a bit of red makes all the red pop" scene
Yet another video by TC that had me thinking, "Hmm, I already know most of this stuff but I'll watch it anyway," only to have my freaking mind blown less than halfway through the video. Awesome work!
i struggled seeing the purple car in purple light as gray
I see it as both gray and purple
Same. It just didn't really appear grey to me.
It's like blue dress gold dress all over again.
@@walkieer exactly
He explained it a lil later. it’s purple because the white in the eyes are reflecting purple as well, and grey is just a darker version of white so in this case it’s just going to be a darker purple.. idk if that makes sense but yeah lmaoo
4:54 - *FINALLY!* I've been waiting so long for that monochromatic cube, staring at it in the background for a year. 😀
This was probably the best, clearest, most thorough version of this topic I've seen. I can only give the video one like counts with Google, but here's a few more anyway. 👍👍👍👍
I'm red-green colorblind and can only distinguish the "hidden" numeral on one or two of the standard color-blindness test plates. This I first learned when attempting to join the US Coast Guard in 1965; they told me not to bother with the Navy, either. I can distinguish red and green in large areas of color, but small ones, such as LED lights at any distance, look absolutely the same -- not white, but some "color" that could be either red or green! A funny feeling. Thanks for a good and entertaining demo of color vision!
Finally a use for my expensive smart light bulbs! Make it impossible for my friend to solve his Rubik's cube
This is evil and I love it
The part about how our eyes render purple absolutely blew my mind! Another video that makes me glad I’m a Patreon supporter.
Purple is not a color... says the colorblind fella who only sees it as blue.
Thanos is not blue.
I see how this happened....
"What shall I write on the white board?" ... "Hmmm... I don't know... something clever..." ... "Aha!"
8:51 Interesting thing that happened to me. Suddenly the etch a sketch in the corner looked more red to me then it did before. The other red objects still looked black or a dark grey, but that looked and continued to look slightly red even when the lighting continued to change. I'm not sure if it was just my brain latching onto it being red and making me see it as redder or what. Even going back in the video though it still looks black until it switched to the colour at 8:51.
Yeah, that's a thing that happens. They're experimenting with something like this to create "hyper colors" in movies by overloading your eyes on a certain color then removing it to make an afterimage in a different or even nonexistent color (apparently they have a developer's edition of Inside Out at Pixar on a special projector that does this)
I’ve never understood what “nonspectral color” meant until now. This is freaking fascinatingg
"What color is this can of spray paint?"
[Confidently guesses] Yellow!
(Some time later)
"That can of paint was yellow, by the way."
My guessing powers prevail once more!
Same exact thing happened to me lol
I thought it was red.
lol
same xD
I also guessed yellow
17:22 "When we look into photoshop we can see, that what looked grey to _us_ is actually fairly purple"
Am I the only one who saw that very same shade of purple from the beginning?
I am seeing putple
Nope. Although that's probably just me and my tunnel vision
I think his brain is compensating.
no you're not the only one but it's so many of us that maybe that's an issue with being in the room and watching on a screen being quite different.
4:55 actually just completely broke my brain for a second it’s been a long time since a RUclips video has actually just stunned me
Adding RGB to your video title instantly increases framerate and clicks by 20%
RGB GAMER LIGHTING 120HZ 2019!!!
Not only does RGB increase your computer's performance and your gaming performance, but also your _video_ performance!
RGB simply means he's a Really Good Boy.
denelson83 Does he get his tendies?
4:53 WHY, YOU LITTLE....
Bamboozled
This is a remarkably good demonstration of principles I knew, but had never actually seen demonstrated. Cool!
When I was a kid I used to grab a magnifying glass and look the box-TV screen because I could see the little "three colored squares" that way. It was kinda fascinating.
I remember the green tube (i guess?) went out in our tv (early 80s) so for 6 months we watched Magnum PI in nothing but bold, bleeding red.
I’m glad I have distinct color receptors with overlap instead of homogenous receptors with filters over them. You helped me appreciate that.
After playing the lighting puzzle in "The Witness" I have a greater appreciation for this.
The town color room makes me unimaginably mad
That set of puzzles is a LOT easier to figure out if you've already taken a class in advanced color theory... as I discovered comparing my experience (without such a class) to a friend's experience (with such a class). XD
Yeoman International> That set of puzzles is a LOT easier to figure out if you've already taken a class in advanced color theory
You just reminded me of a puzzle in _Safecracker_ which was a pain because how does the provided clue make someone think to use the wavelength of a color of light as the code? ¬_¬
@@yeoman588 I sat there with charts and screenshots marking them in MS paint.
@@briennaasher26 That's pretty much what I wound up doing, too. :D
By the way, you actually can't reproduce all colors with red, green and blue. This is because the eye's "color gamut" is a wierd shape (google it) that can't be covered by a triangle.
So adding a fourth color to displays could actually help, but it should probably be cyan or a second shade of green.
6:11 note this is the *normalized* cone responses. In terms of the *absolute* cone response, that overlap point would be different. The peaks aren't (near) equal height as shown there.
Also should clarify, that the spectral colors can only be done in approximation on an sRGB-targeting screen in an sRGB-targeting video. The *actual* colors would be more saturated than your screen can produce. - This is even going to be true for wide gamut screens. Spectral colors can't quite be reached there, unless you primaries are spectral (i.e. using something like a BT.2020 color space) and in that case you can *only* perfectly reach those primaries. All other spectral colors are still technically off limit (though far closer than what sRGB gives you)
I really could've used this video when playing The Witness, i basically stumbled my way through the color puzzle, not really knowing what to do.
Smh I just got 16 minutes into my video before realizing my screens "night mode" was on
Thanks you prevented me from doing the same haha
Many moons ago I attended a prepress tutorial about the colour gamut, and the presenter used an effective way to represent the limitations of colour perception. Behind him was a whiteboard nearly the full width of the room. He drew a line through the middle of the board all the way from left to right. Pausing for effect, he said, "this represents the full frequency spectrum from ultra violet to infrared." Then he portioned off a segment inside that. "This represents what the human eye can see." Then he portioned off a considerably smaller chunk inside that. "This is what your CRT display can represent in RGB." (This is back in the day, l-o-n-g before LCD screens.) Pausing once more for effect, he then bisected the field yet again, saying, "And this is what can be represented in CMYK. And you wonder why you have so much trouble getting decent colour reproduction into your print images. The wonder to me is how much we CAN represent in CMYK, given the puny slice of the colour gamut it can represent."
I've always remembered that. I'm old enough to not take for granted the fantastic colour reproduction that can be achieved today on a modern printing press, printing digital-to-plate.
Your channel has to be my favorite educational tech channel. You leave no stone unturned. I appreciate all of the hard work, you put into these videos. The research must be migraine inducing, sometimes.
I'm red/green colorblind woman (yes, it does happen, lol) and I've struggled to explain for years what it's like. Mostly I boil it down to seeing a whole lot of shades of brown. I struggle with both shades of most colors as well as pretty much everything from red to green unless the colors are super saturated. Especially in darker shades, red, orange, yellow, and green just all appear as shades of brown. Purple is a long time nemesis of mine, as well. It tends to look blue in darker shades or pink in lighter. In dim lighting all bets are out, lol, I ride the gray scale express then. Even throughout your video, I just had to trust you were telling me some of the colors correctly, lol. And a fun fact, I found out I was colorblind by continually failing color and shade tests miserably while in a college art program. I got sick of being badgered by my professors that I would never get a job in art while being moderate/severely colorblind, so I switched my major to business.
don't they test for color blindness when you start school.... and then again in various medical exams, eg for a driver's license or military service?
17:04 who else is seeing purple too and not gray?
One of the problems with this sort of video is that your monitor, what else might be on the screen (giving other color context) as well as your particular color vision can make things appear differently than how I see them.
For maximum effectiveness on the gray-looking body, you'll want the video to be full-screen. And, to me at least, he looks the most intensely grey in the low shot where you can see his tongue.
@@TechnologyConnections To me it's looking very purple, every time you say grey, I stop stop video and wondering... where is the GREY :) ?
@@2madrobot If I pause and then stare at his... "nose" for a few seconds, the color fades (not quite completely, still looks a little purple). Maybe try that.
@@TechnologyConnections Upon sticking my phone screen right up to an eye I can see what you were saying. It did indeed begin to appear monochromatic.
I think you should probably add some annotation to that section saying that for maximum effect the display should take up the majority of your vision. I think a fair few people are probably similarly confused by it.
Just a genuine observation- the low shot is when he looks the MOST purple to me! That being said, every winter I argue with my boyfriend about whether my coat is dull green or grey (it's faded, but green thankyouverymuch).. so it's maybe my/our color vision distinguishing whats IN grey?
This was a fantastic video, and now I want to play with colored lighting on camera, too.
I've always enjoyed the effect you get from aiming two color lights at an object from different angles to get a relatively normal looking object but with colored shadows.
I have protanomaly, a type of red-green colourblindness, and despite this, throughout most of this video, I have agreed with most points; The red in the ship comparison looked darker, but that was it, until you brought out Tug Tug. Very interestingly, at 16:44, to me at least, Tug Tug doesn't look gray at all! He looks more like a purplish-blue. In fact, Tug Tug at 16:25 looks _more_ gray that at 16:44! This is super fascinating to me, and I wonder why?...
I would be interested in seeing a video about 2-strip technicolor in early color films, and about color in films in general.
I love how the humor in this is so subtle, and gentle, yet still manages to make me chuckle. Also, my mind has officially been blown, and I'm at only around the 5 minute mark.
Now I know why the "white" setting for the RGB strip in my PC makes the red components pop so much.
Super neat demonstrations.
I'm surprised you didn't run into any fluorescent pigments. When I played around with RGB lighting, I found some things would light up green under blue light, and many things would light up orange under either green or blue.
Oh, he did run into fluorescent objects. He showed them in the Technology Connextras counterpart video.
BUT WHAT COLORS WERE THE CONSTRUCTION PAPER; HELP
You can see at 13:48 they're pink red orange yellow green blue purple and black.
They were at the beginning to
All construction paper is bright orange, so it can be seen better by drivers.
@@flyingcatpack brilliant
I wanted to know specifically which one was which under the red light but it was mostly a joke. I understand the point was you just can not really tell.
I once wrote a new song's lyrics, in red, and stuck it to the stage foldback. Song starts, looks down, nothing, Red stage lights. Proceeds to sing first verse three times. No one noticed. Never did that again. Terrifying.
One of the reasons why lighting in purely virtual environments (rendering for movies, architectural illustration, games) is really hard to pull of if it becomes any more complex.
Want to see what the reflection of a red ball on a green wall looks like? Well - most textures are encoded in some sort of RGB and will Not give you a good or even decent result.
We really need a more powerful way of encoding color, something like a 8 value color spread over the spectrum maybe?
That could still nto reproduce such strange effects like pumpkin seed oil.
I find it interesting that the human eye is most sensitive to the blue, green, and greenish-yellow spectrums of light, and what do we see at the beginning of the video: a blue light with a little blue and a lot of white spots at the bulbs, a green light with a little blue and a lot of white spots at the bulbs, and a red light with a lot of YELLOW and eventually a little white spots at the bulbs. Perhaps because the red spectrum of light is more interpretive than green or blue, so the colors we are most sensitive to appear first (blue and yellow), and since we are less sensitive to red light it takes longer for the red color to bleed through with all the other colors and produce white. That's so cool!
Also at 16:51 every time you say "grey" I actually see purple. But if I focus really really hard, I can convince myself it's grey and it's like it changes color. And my eyes hurt.
Jadrolinija :) :) When you see your home town and ship in Croatia on random video talking about colors
Totalno me iznenadilo. Također iz Splita btw