Sorry, I said I would show an example of how subtractive color mixing
works after I gave a wrong example. So, just very briefly...
It helps to see a rough color circle. So you can see opposites.
R
Y P
G B
C
R = red
Y = yellow
P = purple
G = green
B = blue
C = cyan
When painters mix cyan + yellow they get green.
The paints or inks filter out colors.
So look on the other side of the wheel to find the opposite.
cyan = -red
yellow = -blue
the white paper reflects all colors
white = red + green + blue
cyan + yellow = white - red - blue
= red + green + blue - red - blue
= green
