I'd like to see a CMYK color selection. Photoshop has one that uses sliders. 1 slider for each color C,M,Y & K. I've found this has been incredibly important when mixing colors. With the RGB color selector thats in now, I find that I'm always adding black to make a color darker but with CMYK I can control K and make darker hues by increasing CMY and lighter hues by decreasing CMY while never adding black.