>> Colour vision is not much help under low light conditions which is the reason our distant shrew-like ancestors lost their colour vision in the first place.

>> Colour vision is not much help under low light conditions which is the reason our distant shrew-like ancestors lost their colour vision in the first place. You seem to have authority, clearly, but doesn't your statement very precisely support my claim that we are now living in a society that dis-favor the color-blind? Our ancestors lost their ability to distinguish colors but now (all of a sudden) color seems very important. So we have in fact started, very recently, to select for non-color blindness. No?