What does "reddish green" look like? Not brown, not olive - an actual color that's simultaneously red and green the way cyan is simultaneously blue and green. You can't picture it. Neither can I.

Scientists cannot say for certain, but new research suggests that different people’s brains respond similarly when looking at a particular hue. By Kenneth Chang After decades of brain research, ...

An estimated 300 million people worldwide are color-blind. This typically means they can't distinguish certain shades of color, they struggle to tell how bright colors are or, more rarely, they can't ...

What is color? How do we see in color? Do all people (and our pets!) see color in ...