A few days ago I found somewhere on the forum a nice article that was discussing mixing colors and mentioned that certain primary colors had a degree of other color in it and was not good for mixing a particular secondary color. Example would be like "Whatever Red" had a little yellow in it, so would not be good at mixing for greens, etc. I knew I should have printed it out but figured I could find it again later. oops. Anybody know what that was? I've been searching and am crying uncle.