Researchers at UC Berkeley claim to have induced a previously unseen color by using lasers to stimulate only the M cones in the retina, creating a visual experience beyond the natural limits of human perception. Called olo, the color is described as a highly saturated blue-green but is only visible ...

Researchers at the University of California, Berkeley, say that by stimulating individual cells in the retina that the laser pushed their perception beyond its natural limits.

The specifics of the claim are contested, but the ability to precisely stimulate the retina with lasers is cool whether or not it's really a 'new color.'