When your brain lies… There is NO yellow, nor red, nor green in the picture below! The only real colors are blue, cyan and magenta. Scientists and artists call these color induction effects “simultaneous color contrast” and “color assimilation”.
The chromatic illusion works even if the colors are inverted. For instance, there is NO blue, nor cyan, nor magenta in this picture below. The only real colors are yellow, green and red.
For those who want to experiment with this color concept: https://shadertoy.com/view/7ltBRr