How is it related to colorblindness? For most types of colorblindness relative comparisons are affected too. And for non colorblind people, all kinds of conte

How is it related to colorblindness? For most types of colorblindness relative comparisons are affected too. And for non colorblind people, all kinds of context in an image can change perception of color, similar to relative pitch (blue/black white/gold dress anyone?).