ColorChooser

ColorChooser is a free app that allows you to pick a single color (or capture a sample with the camera), and displays two, three or four coordinating colors based on established color theory models.

It provides hexadecimal and RGB values for both web and print designers. You simply select the color model desired, and drag the main color around the color wheel to vary its hue and saturation level. The remaining one, two or tree coordinating colors move in relation to the main color, both in terms of hue and saturation. You can alter the position of the coordinating colors on the color wheel for a “custom” scheme, and they stay locked to the main color.

A rectangular color picker is provided to allows you to vary the saturation and luminosity value for the chosen hue. Ample color swatches are provided, including a lighter and darker variation for each coordinating color. You can save the color schemes and reload them at a later date, and you can even email the colors directly from ColorChooser.

Highly recommended.