Jeremy -
Oh man no offense at all !!! Sorry if it came off like that. 
I actually realy appreaciate your efforts to help. I DO think the Toxic Labs stuff might be just what I am looking for. ANd I am really grateful for that tip. It is a really complex issue, and so I am very used to trying to explain it. its all good for sure.
I am still newb at how to utilize libraries. So it will take me some digging to figure Toxi out but I think it may very well be just what i need, algorithms to pick colors from the additive based upon subtractive space.
The fact that I am not finding a lot, makes me feel like developing this stuff is really worthwhile too :).