Quote Originally Posted by liev View Post
It seems to be working out like this:

deepens red = increases red
lightens red = increases cyan

deepens green = increases green
lightens green = increases magenta

deepens blue = increases blue
lightens blue = increases yellow

Regal Purple was produced by deepening red and blue and lightening green aka +red +blue +magenta
Celeste Green was produced by lightening red aka +cyan
See, this makes the most sense, and is what I was playing with before (though I kept it in the RGB form), but there are a few examples that just don't match, or even close to match. It seems to work so well for most things, but a few outliers keep throwing me off.