Because most human beings grow up using crayons and paper, are surrounded with bright colors on white, and don't know how to deal with sophisticated technologies like printing inks (the mixing of subtractive primaries) or the mysterious interplay of light (the mixing of additive primaries).

So the Red Yellow Blue triade is very common to everyone.

Although I did notice that youngsters working in cafes or clubs know very well how to control the Red, Green, and Blue channels of the lighting rig, to set a warmer (yellow, reddish) mood, or to shock guests with a dull cool blueish atmosphere around closing time, in order to make them leave...

Oorspronkelijk geplaatst op Quora: Why do we use the RYB color model for complementary colors instead of the RGB model when one model gives red and green the other gives red and cyan?"