An Illusion Makes You See a Black-and-White Photo in Full Color
Photo by PRPhotos.com
The BBC has a new series called "Colour: The Spectrum of Science". And a clip from a recent episode is going viral, because it tricks your brain into seeing a black-and-white photo of a castle in FULL COLOR.
First they show the photo with a bunch of bright colors added in. And you have to stare at a blue dot for about 30 seconds. Then it switches to black-and-white . . . and if you keep staring at the center of it, it looks like it's in color.
Basically, staring at the bright colors messes with the light receptors in your eyes, and makes one of them stop working temporarily. And it only works because of the specific colors they used.