Painter’s Picker version 0.5 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. [Via: Roars and Revelations]
It installed easily into my computer and provides an interesting version of the colour wheel. This should help on those websites where I just can’t decide which other colour to bring in to the design.