I stopped thinking in terms of the RYB "color wheel" shortly after middle school art class. RGB and CYMK seem natural to me. If you're interested in a color wh

I stopped thinking in terms of the RYB "color wheel" shortly after middle school art class. RGB and CYMK seem natural to me. If you're interested in a color wheel for a picker design that has perceptual evenness, check the Munsell CS (http://en.wikipedia.org/wiki/Munsell_color_system http://en.wikipedia.org/wiki/Munsell_color_system) ... in a color picker it might be cool to select via projections of CIELAB as the refined version of same.