Impossible color
I’m surprised the section towards them end about alternating high contrast colors producing impossible colors doesn’t link to “fechner colors” [0]. I am red-green colorblind, but when I was young I would stare at my dark ceiling fan spinning over the white ceiling and see very vivid greens and purples swimming across the blades.<p>[0]: <a href="https://en.m.wikipedia.org/wiki/Fechner_color" rel="nofollow">https://en.m.wikipedia.org/wiki/Fechner_color</a>