Woa!!! You really let me amazed! Must have the knowledge to relate the positive/negative color. Must be quite amusing work with this kind of art And I see it worked perfect!!!!! Both for the art itself as well for the colors
It's not how the colors work, it's the concept of being able to blend them in negative and be able to have them come out the right shades of color that confound me. I'd probably get the wrong shades of colors, especially for the flesh tones, which are normally hard enough on their own to start with.