First, just another quickie to say that I have produced a new kindle ebook containing 101 Friday Puzzles!  It is called PUZZLED (available in the UK here and USA here) and contains 101 puzzles and the solutions. If you are a teacher, trainer, have a curious disposition or just enjoy the blog, feel free to show your appreciation by buying PUZZLED!

This is really lovely – just get the gif running (you may need to click on it to open it in another page) and then stare at the cross.  Bingo…..a black and white image appears in full colour.  I have seen a few of these but this is by far the best.

Did it work for you?







  1. Woah, OK, it was only for a split second but yeah, I saw it in full colour when it changed.

    That’s seriously awesome.

  2. I find that I can look at the black and white picture and then back at the dot to see color again. Also, while looking at the dot, rotating the screen slightly and then back makes it go black and white and then back to color.

    1. I noticed the same thing.
      Look away, and it snaps to black and white. Look back at the dot and it’s color again!

      Now I’m curious- does the trick work in images where the values (blacks and whites) are inverted instead of the colors?

    1. Finally saw it on my fourth try. I found it easier to see the green in the trees than the wall colour.

  3. Nice after image. As long as I don’t let my eyes twitch or budge, I can hold the color the whole time it stays black and white! I know a neuroscience professor who would like to use this in part of his sensation and perception lecture 🙂

  4. Woah! First time I saw it I thought it was one of those silly ones where the reveal is exactly what you see. I had to blink lots before I realised it was black and white! So clever.

  5. Yeah… I like this one, too… I also posted this gif picture in my blog… 🙂
    There is another one in my blog: Rainbow Illusion. Please feel free to take a ‘walk’ there. 😀
    Thank You

  6. For anyone who hasn’t realised, you have to click on the photo to get a pop up and watch till the timer finishes and the picture is switched.

  7. i cannot see the color of the right wall. the color of trees and left wall momentarily blind me to the right wall and by that time all colors have vanished.

  8. Couldn’t get this to work until I zoomed in and made it bigger – then wow! The moment I looked away from the dot and focused on the picture detail, like the trees, it went to black and white again.

  9. I was sent one of these images last year and was so impressed that I set about transforming our family holiday snaps. Great fun!
    If you continue to stare at the one point after the change to b&w you can sustain the colour after-image almost indefinitely.

  10. Worked like a charm. I noticed that, as soon as I blinked, that the picture reset to greys. All in all a very impressive illusion though.

  11. If I concentrate very hard on keeping my eyes on the spot the black and white picture will stay in full color for several seconds. If I blink or move my eyes even a tiny bit the color is gone and I can’t get it back.

  12. That’s great the first time I tried it I glanced down at the instructions which immediately cleared the vision. But the second time I could see colour almost until the image flipped again by just continuing to stare at the dot..

  13. Seen it before (possibly on this very blog), but still impresses me.

    I’m always taken aback by the number of ways my brain is lying to me.

  14. Very nice. I imagine that the neuroscience behind this one has to do with cone receptors becoming overstimulated during the leadup phase, then continuing to fire when you switch to the black and white image. I don’t remember my visual pathway neuroanatomy enough to puzzle the whole thing through though.

  15. My visual system longed for the ugly colored image so much that it imposed the colors on the black and white image. There, that’s the most simple (and possibly misleading) way I could explain the neuroscience behind the phenomenon.

  16. Wow, i was looking for another thing like…
    Once i saw in black and white for a few seconds i don’t know why, and i was looking for an answer to that… then i found this, interesting =D

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