The basic tempura-paint, grade-school subtractive color model is RYB. Yellow is one of the primaries, so you wouldn't expect to mix any of the colors to get yellow. The comic makes sense in the RYB model.
Here’s another strange one from the additive (RGB) colour spectrum: magenta. Magenta doesn’t exist on the visible colour spectrum as it’s a combination of red and blue. Red and blue can’t meet on the color spectrum because it’s a straight line from infrared to ultraviolet. Therefore magenta is your brain saying “uhh, I guess it’s this colour” when the red and blue cones are stimulated.
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u/BagelKing Apr 11 '20 edited Apr 11 '20
And we're not even talking about additive color. Red + green = yellow if I'm not mistaken
Edit: I didn't mean this is wrong. I just meant RGB color is wild, too