then you have two signals, that these get combined into. You have a Red (actually pink) + Green - Blue (actually cyan) signal, (magenta-green continuum) and a Red + Blue - Green signal. (blue-yellow continuum) You brain does math on these two signals to extract a red green blue components back out of them, but there are some mixtures that can't be encoded/decoded with that method.
I know how pigment and computers work. I'm not talking about that.
https://www.youtube.com/watch?v=cQCsDfEqr9o
it's called the opponent process.
You have three light sensors.
red, green, and blue.
then you have two signals, that these get combined into. You have a Red (actually pink) + Green - Blue (actually cyan) signal, (magenta-green continuum) and a Red + Blue - Green signal. (blue-yellow continuum) You brain does math on these two signals to extract a red green blue components back out of them, but there are some mixtures that can't be encoded/decoded with that method.
https://www.youtube.com/watch?v=cQCsDfEqr9o
The magenta-green you mention is the 'blindspot' the other signal nerve, and the second unperceivable color.