Fantastic project, but this is the wrong community to post it in; the rules of the community clearly state that "a post must be (or contain) a qualifying data visualization."
It is the difference between additive mixing and subtractive mixing. When you mix colors on a screen with RGB, you add light. When you mix pigments on a physical medium, you subtract the amount of light reflected (because each paint absorbs most light except the colors it reflects, which are what you see).
As a side note, when mixing in the subtractive color system, your primary colors are cyan, magenta, and yellow. That's why a printer takes CMYK, for cyan, magenta, yellow, and black. In case you were wondering, 'K' here is black.
Believe me, as a gay man, I am confident with the bouquet smell.