This blows my mind. There is a technique that allows us to map the distribution of cones in a person’s eyes. You would think that there is some consistency from individual to individual, or that it would be distributed in some predictable manner but! No!
What happens when you show each of these people a flash of color and ask them to just give us a name? Something like you’d expect – the person who only seems to have red cones seems to name just about everything either red or white. Those with a broader distribution of cones give a broader distribution of colors. You can even predict the colors that someone will name based solely on the tiling of these cones.
And none of these people are technically color blind! What kind of a world is BS seeing??
Brainard, D., Williams, D., & Hofer, H. (2008). Trichromatic reconstruction from the interleaved cone mosaic: Bayesian model and the color appearance of small spots Journal of Vision, 8 (5) DOI: 10.1167/8.5.15