White balance (Color Suppression) Formula?

Question

I need help with a little bit of color math.(RGBA) I\'m trying to reduce the amount of green on a character, without actually affecting the green background. Green screen fo

Answer 1

Thankyou everyone for your thoughts and ideas. Every comment was a spark that led me to, which I think is, the closest to a solution. It does need more work. If you take a closer look at his fist, you can see it break abit. The next step for this is to build in adjustable values to affect the weight of the effects.