so here's a straightforward question what color are the strawberries in this photograph the red right wrong those strawberries are gray if you don't 00:00:12 believe me we look for one of the reddest looking patches on this image cut it out now what color is that it's great right but when you put it back on 00:00:25 the image it's red again it's weird right this illusion was created by a Japanese researcher named Akiyoshi Kitaoka and it hinges on something called color constancy it's an incredible visual 00:00:39 phenomenon by which the color of an object appears to stay more or less the same regardless of the lighting conditions under which you see it or the lighting conditions under which your brain thinks you're seeing it