Painter's Picker is an extension to the color picker panel in Mac OS X. It adds the ability to choose related colors, such as complementary colors, analogous colors, etc. directly within the color picker. It also adds more precise controls for choosing saturation, hue angle, and brightness, and provides the ability to choose colors in the CMYK color space while using the popular HSB-style controls. Painter's Picker has been designed to be the simplest way to perform complex color selection within nearly any application in Mac OS X.
Painter's Picker