This is solved through https://en.wikipedia.org/wiki/Primary_color#Imaginary_primaries https://en.wikipedia.org/wiki/Primary_color#Imaginary_primar... that sit

This is solved through https://en.wikipedia.org/wiki/Primary_color#Imaginary_primaries https://en.wikipedia.org/wiki/Primary_color#Imaginary_primar... that sit outside the visible spectrum.