This may be the closest you'll ever see to the color with the ridiculous name of "olo".
To see true olo, you need a mad scientist to map your retina, individually identify each cone cell as one of 3 kinds - and then use lasers to deliver tiny doses of light exclusively to the cones of one kind: the "M" cones.
The 3 kinds of cone cells, amusingly called S, M and L, respond to different colors. But there's no kind of light that excites the M cones without also exciting the others! So you can't see pure M in nature - the color called (0,1,0) or "olo" for short. You have to hire a mad scientist to make you see it.
This first happened on 18 April 2025 at U.C. Berkeley. Only the five victims of this experiment have ever seen olo. Professor Ren Ng, one of the mad scientists involved, described olo as "more saturated than any color that you can see in the real world". His victims describe the color as a "blue-green of unprecedented saturation", and will live the rest of their life haunted by this vision, depressed by the boring, bland colors they usually see.
