Patch color selector

Selecting colors for a number of patches to avoid neighboring patches with the same color.

This small tool selects colors for a number of patches so that no any neighboring pair of patches have the same color. The tool was motivated by representing clusters produced by k-means.
http://www.mathworks.com/matlabcentral/fileexchange/19344

It can also demonstrate the famous four color map theorem. The embedded example explains how to use this tool.