Is there an algorithm for color mixing that works like mixing real colors?

Question

The common mixing of RGB colors is very different from mixing colors for paintings, it\'s mixing of light instead mixing of pigments.

For example:

Bl         


        

Answer 1

Wondering if calculation of inversion of the RGB value work. Since it's about subtraction of lights, technically the subtraction part can be calculated by simple math.

For example cyan + yellow

cyan = 0x00ffff yellow = 0xffff00

Their inversions are 0xff0000 and 0x0000ff, meaning they absorbed red and blue lights completely. Their 1:1 mixture should absorb half of red and blue lights (since the other half of the mixture can still reflects some red and blue light), which is consistent with (0xff0000 + 0x00ffff) / 2 = 0x7f007f. Now we subtract the value from 0xffffff we have 0x80ff80 which is green!