What does "reddish green" look like? Not brown, not olive - an actual color that's simultaneously red and green the way cyan ...

TL;DR: Researchers have discovered a color called "olo," unseen by humans before, by stimulating specific M cones in the retina. This breakthrough bypasses natural RGB limitations, revealing a unique ...

Can you conquer the impossible color challenge? Try this fun brain teaser and see how you do!