Articles, Blog

Will This Trick Your Brain? (Color TEST)

November 7, 2019

Humans can discern between 2.3 million colors – but try staring at this picture of us bursting through the periodic table and focus on the green dot as we invert the colors. Don’t stop staring there until I say the light is traveling as a wave to your eye, and the frequency of these wavelengths determines the perceived color of everything in this picture and around you. Humans have trichromatic vision, meaning we have three con cells in our retinas, each which are sensitive to different wavelengths of light; blue, green, or red. Keep looking at the green dot and your brain will do something pretty neat. Did the image change back to the original color? Even though you were staring at a black and white image, your brain perceived it to be in color. This phenomenon is known as “after imaging” – after staring long enough at the brightly colored image, your cones slowly become fatigued and the supply of photo pigment in the respective cones becomes exhausted, which ultimately stops sending signals to the brain. In case of this illusion, the part of the photo where you can see cyan, the green and blue cones become tired and as a result, there is increased activity in the fatigued red cones. So when the image switched to black and white we see “red” – cyan’s complimentary color. Growing up, you likely learned about the primary colors red, yellow, and blue and their respective complimentary colors. But things are more complicated when you consider that the primary colors in your printer are magenta, yellow, and cyan, or that the screen you’re watching this on uses red, green, and blue. These are different color models, where RGB is “additive” meaning the mixing of different lights of color creates new colors – while the other two are “subtractive” models and absorb different wavelengths of light. For example, when you hold a yellow object in real life, it’s actually absorbing every wavelength except yellow – that yellow light bounces back and hits your eyes. But, when you look at this yellow object through your screen, it’s actually not yellow at all! Because your screen can only use red, green, and blue colors, if you were to zoom in physically on anything yellow, it would actually be a combination of red and green – and because the wavelength of yellow is between red and green, our brain interprets this mix as yellow. So, what you’re seeing here is in fact not yellow at all, but it’s stimulating a mix of your red and green cones interprets as yellow! While plants come in a range of colors, the predominant color is green, due to chlorophyll, the energy absorbing pigment found in plants critical for photosynthesis. So, the effectively attract pollinators such as bees, insects, and birds, flowers have evolved to stand out against green. It’s why you don’t see many green flowers! And flowering plants have even evolved a suite of different colors to attract specific pollinators – known as pollinator syndrome. Bird-pollinated flowers are mostly red, potentially to discourage visits from bees, as their visual system is different than birds, making it hard from them to discriminate between red and green. Similarly, we all have our own favourite colors, but why? One theory suggests that color preference is gendered, where given the choice between cyan and red, men prefer cyan colors and women prefer redder colors. Researchers hypothesize this preference has evolved from our hunter-gatherer societies where women’s visual systems were specialized to see ripe red berries against green foliage. Another theory suggest that we like hues that we associate with pleasant things – however pleasant and unpleasant things are often the same color – we love blue Slurpee but not blue mold. Investigating these questions of color had us thinking about links between science and art So in our latest AsapTHOUGHT we asked both artists and scientists about how they view the world. Let us know in the comments what your favorite color is, and subscribe for more weekly science videos.


  • Reply Rosie D April 4, 2019 at 9:31 pm

    Is there something wrong with me if after imaging dosnt happen to me?

  • Reply spidey beb! channel April 5, 2019 at 3:53 pm

    i did not look at the dot and it was bnw

  • Reply FurbyCraft April 6, 2019 at 2:59 am

    The color thing is actually a simple trick. You can do it to anything by staring for up to 30 seconds and see the colors inverted. It’s not as effective in the video because you need to blink then stare at a solid (or as close as possible) white background to see it well.

  • Reply MissWhovian April 6, 2019 at 8:57 am

    Wait… if my favourite colour is purple, does that explain why I'm non binary?

  • Reply Lucy Kershaw April 6, 2019 at 11:54 am

    Like this is the trick at the start of the videos didn’t work for you

  • Reply so i exist April 6, 2019 at 6:00 pm

    You should do a test with a very dark blue cuz some people in my class thought a paper of mine was purple when it's blue

  • Reply black shadow April 7, 2019 at 3:10 am


  • Reply MicrowaveOven111 Aka Kaia April 7, 2019 at 3:44 pm

    If you look closely at the yellow screen you can see the green and red

  • Reply Jessica Harrity April 8, 2019 at 9:08 am

    Didn’t work ;-; I saw no colour

  • Reply Randum Bros April 9, 2019 at 12:54 am

    Sees bread yay it’s blue nom nom

  • Reply Code Master April 12, 2019 at 9:44 pm

    Wait… I see black and white…

  • Reply Preston Turner April 14, 2019 at 6:18 pm

    This is face

  • Reply Libby-Rose Nicholson April 14, 2019 at 8:56 pm

    these videos do not make sense

  • Reply I love bughead April 14, 2019 at 9:50 pm

    Why am I here ?

    I'm colourblind

  • Reply Lifeform Lover April 17, 2019 at 12:38 am

    “Cyan” doesn’t seem like an appropriate term for neon light blue.

    Cyan is more a mix of blue and green. Like this

  • Reply Chungus Sniper April 17, 2019 at 3:40 am

    The first one is a lie

  • Reply vaughn burtenshaw April 17, 2019 at 6:50 pm

    Racist !!!!!

  • Reply Brandon Phommabout April 18, 2019 at 2:59 am

    I saw a purple dot in the middle is that what's supposed to happen

  • Reply evank.02 April 18, 2019 at 6:17 am

    2:06 I don't think this looks how they were hoping it would look like.

  • Reply Life Is Traumatic April 18, 2019 at 10:15 pm

    What if we saw it to be black and white (I know I'm not the only one 😂)

  • Reply Willa Smith April 20, 2019 at 12:06 am

    It was black+white

  • Reply FlowerSunsetBaby April 22, 2019 at 9:35 pm

    im a girl my fav color is cyan

  • Reply Lukeland April 29, 2019 at 11:13 am


  • Reply Xboy Dubose April 30, 2019 at 9:03 am

    I like cyan and red, but my favorite color is orange

  • Reply Leela M April 30, 2019 at 11:31 pm

    But I like cyan and blue..?

  • Reply Izzy Gacha May 5, 2019 at 1:48 am

    The part where you said girl prefer red mad me mad, I’m a girl and i prefer blue

  • Reply midnight animations May 5, 2019 at 6:21 am

    i saw a flash of color

  • Reply Yann cedric Totsingan May 14, 2019 at 10:18 pm



  • Reply The Future King of GAMING May 14, 2019 at 10:54 pm


  • Reply Game Sunset May 15, 2019 at 7:48 pm

    But my fave colour is blue what the flip I'm a girl

  • Reply Lucy Wallenius May 21, 2019 at 6:11 am


  • Reply stay hydrated May 24, 2019 at 8:12 pm

    the image trick didn't work for me lmao

  • Reply AJW May 25, 2019 at 8:27 pm

    I was not looking at the green circle on the first one yet it still changed color

  • Reply sasy May 27, 2019 at 4:47 pm

    I was trying to read the translation and focusing in the green dot in the same time

  • Reply Jxhnny Gxddamn May 28, 2019 at 9:17 pm

    Na it didnt

  • Reply Clutter's Lullaby May 29, 2019 at 2:57 pm

    I blurred image with my eyes (idk how to say correctly lol) and then it switch to white n black it just dissapear, turning everything to white

  • Reply jazzthegymmast 1 June 1, 2019 at 1:51 am

    For the first one, it was color first and black and white afterward

  • Reply jazzthegymmast 1 June 1, 2019 at 1:59 am

    For the first one, it was color first and black and white afterward

  • Reply Flakk The Gamer June 2, 2019 at 2:51 am

    it was black and white lmao

  • Reply pragun June 2, 2019 at 11:15 am

    1:26 the predicted the hole punch display!

  • Reply Xxxvipex35 June 4, 2019 at 5:14 pm

    0:04 clickbait

  • Reply KJT VLOGS June 6, 2019 at 12:14 am

    It didn’t work when I was staring at the green dots but it worked when I looked at the cyan colors

  • Reply Philippine Mapping,Gameplays and Fails June 12, 2019 at 4:17 am

    My brain slightly fell for that

  • Reply 24kelvin June 13, 2019 at 4:42 am

    Was i the only one who didnt see the image change colors

  • Reply ODD ONE OUT PUZZLES June 13, 2019 at 7:51 pm

    Wow! Like the video👍

  • Reply Nathan Long June 14, 2019 at 10:54 am

    This is fake, I closed my eyes when the green dot showed up then opened when the screen went back to white and the letters were still grey.

  • Reply LuckyMrporsche June 18, 2019 at 1:35 am

    0:57 The cones on the bottom are questionable in the look

  • Reply Gena skull June 18, 2019 at 6:21 am

    If you dont get what the black and white part means. You should see the images still be colored for a sec although it switched to black and white, it's like a flash you'll bearly glimpse it. If you dont see it try again and focus turn down your brightness so you dont want to blink and kinda half way shut your eyes so you dont wanna blink, and you'll suppose to see it

  • Reply Charles Canlom June 19, 2019 at 11:42 am

    Are You Kidding Me?
    If I Don't Look At That Green Dot In The Second Time, It Just Go Back And White

  • Reply Got7 is- MY ULTIMATE GROUP June 22, 2019 at 1:57 pm

    Blue is my favorite color and when I was still a child, I've always thought that it was so handsome.

  • Reply Ethan Faulkner June 23, 2019 at 2:20 am

    it's fake

  • Reply Ethan Faulkner June 23, 2019 at 2:21 am

    I didn't look at the changed screen yet after i looked and it was black and white

  • Reply josue alimorong June 24, 2019 at 11:51 am

    I saw the original color :O

  • Reply Kaiya Taylor June 24, 2019 at 11:44 pm

    it changed the black and white to the inverted way

  • Reply Forest Meme June 25, 2019 at 2:30 pm

    I saw Black and white at first, but i tried to do it again but without looking at the green dot it was still black and white. FAKE!

  • Reply auni mations June 25, 2019 at 4:47 pm

    Im a guy and i like red

  • Reply a person June 26, 2019 at 1:18 am

    the first one didn’t work for me… am I broken

  • Reply Skeso2kPlayz June 26, 2019 at 1:17 pm

    When you look at the green dot and look back in the beginning it’s a normal color but in 0:40 they only changed the color

  • Reply Konrad Gembicki June 27, 2019 at 11:03 am

    I asked my brother (he didnt stare at the green dot) said it was black and white

  • Reply Konrad Gembicki June 27, 2019 at 11:03 am

    It is fake

  • Reply I Bathe In WaterMelons June 27, 2019 at 2:55 pm

    The first one is in black and white anyway I tested it lol

  • Reply Uki GTV June 27, 2019 at 5:12 pm

    I think the pikcure is all ready black and white

  • Reply Peeko the legendary slakoth June 28, 2019 at 2:01 am

    dude. i didnt look at the dot and it till went black and white. pretty sure you just changed it

  • Reply Peeko the legendary slakoth June 28, 2019 at 2:04 am

    im a girl an i like blue……….
    and pink is my least favorite color
    oh well

  • Reply GJ Goldman June 28, 2019 at 3:19 am

    It was still black

  • Reply Claudia Washington June 28, 2019 at 12:53 pm

    0:34 no, you just changed it.

    I’m not surprised.

  • Reply maddyg 123 June 30, 2019 at 5:33 am


    Me: no it’s black and white

  • Reply Ehsieplayz FTW June 30, 2019 at 10:31 am

    The trick was fake I saw the frames

  • Reply Juan Ma 78 June 30, 2019 at 8:59 pm

    I still see it in black and white…

  • Reply gαlαxү qυεεη July 1, 2019 at 6:35 am

    I tried not looking at the green dot after words and yet it's still black and white. Is there something wrong with me? Help?

  • Reply yellow_vx0 July 1, 2019 at 10:54 am

    Oh… Green flowers

  • Reply 7 11 gaming July 1, 2019 at 7:03 pm

    The first picture didn't change to the original color for me

  • Reply Wise Oracle July 5, 2019 at 7:59 am

    Some humans are dichromatic or tetrachromatic.

  • Reply Wise Oracle July 5, 2019 at 8:02 am

    2:50 the reason for the pink/blue colour stereotype for boys/girls.

  • Reply Sima mishra July 5, 2019 at 5:08 pm


  • Reply The Gamer118 July 6, 2019 at 2:44 pm

    Its very funny how a more than 3 munites video teach us more than school

  • Reply Brook and Nat July 8, 2019 at 1:12 am

    If you don’t stare at the green dot it still goes to black and white

  • Reply Avery Ep July 8, 2019 at 4:02 am

    I’m colorblind, what am I doing here??🤨

  • Reply Proffesor Carrot July 17, 2019 at 5:53 am

    I just see no color
    On your picture

  • Reply Jaymart Vlogging Channel July 18, 2019 at 8:49 am

    Guys!Try to pause the video and
    Click this 0:34
    It is still black right??

  • Reply Animals Are Our Angels August 8, 2019 at 8:36 pm

    This did not work for me? Is this a joke? Yes, it is 🙄🙄🙄

  • Reply Mark Allen Hansen August 11, 2019 at 4:55 am

    (+-+)../#rockon#Thatexellent #wegotwife 😐😋😁

  • Reply BowserJrDottieDuo August 17, 2019 at 3:07 am

    I saw black and white

  • Reply X7jamie 505 August 17, 2019 at 9:50 pm

    i didnt look at yhe green dot and it still changed

  • Reply CSF1307 September 18, 2019 at 7:57 pm


  • Reply Jason Conner September 18, 2019 at 9:08 pm

    lies i thouht this was real i washed and lisend then started it over and closed my eyes until yo sayd is it the same colers as before pend my eyes and it was still gray so it was it is an edit

  • Reply Kalabog Bosyo September 19, 2019 at 5:33 am


    Umm my fav color is purple is it more red or blue I mean it looks more blue but I’m a girl maybe because I’m tomboy?

  • Reply Alan Duffy September 22, 2019 at 11:56 am

    Colour not color

  • Reply Chef Pee Pee September 22, 2019 at 7:03 pm

    Better than school.

  • Reply Qpops B00M September 25, 2019 at 5:27 pm

    Its fake i didnt Look at green and still black and white

  • Reply Glitter Corn September 26, 2019 at 4:47 am

    woAh! I’m actually learning this EXACT thing in my science class!! 😮

  • Reply Legendary Clash September 29, 2019 at 1:50 am

    It did not trick me but it happens to me when I close my eyes

  • Reply JxyRBLX September 29, 2019 at 2:04 pm

    I had it black and white

  • Reply Sunny Girl October 1, 2019 at 1:23 am

    It's not true he just changed it.. I didn't look and looked at it and looked back and it changed.. FAKER

  • Reply Sharlene MacLaren October 5, 2019 at 4:43 am

    Huh? I don't think my 71 year-old brain can watch this to the end.

  • Reply kamala kamala October 13, 2019 at 12:16 pm

    I'm blind after seeing video>•<

  • Reply Yeeter Skeeter October 22, 2019 at 4:19 pm

    guys if you cover the green dot it still goes back to black and white

  • Reply Zainab S October 24, 2019 at 7:57 am

    I only see black and white

  • Reply N.K. W. October 29, 2019 at 5:01 pm

    Doesn't work for me somehow, none of these YouTube illusions do anything for me 🙁

  • Reply Solar Flare October 31, 2019 at 10:33 pm

    my brain is so strong i saw black and white

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