>it's literally modeled on the density of cone cells in the human retina
It's related to it, but not "literally modeled" on it. This number is from experiments where people are asked to equalize perceived brightness of two lights with different colors. The results are than averaged out and interpolated using polynomials to create a color model [0].
It's related to it, but not "literally modeled" on it. This number is from experiments where people are asked to equalize perceived brightness of two lights with different colors. The results are than averaged out and interpolated using polynomials to create a color model [0].
[0]: https://en.wikipedia.org/wiki/Color_model