Color Field is a useful component you can use to extend the functionality of SharePoint. Enter any number of choice values and assign a color to each of them. Now every item that uses one of the choice value will have the background color changed to that choice's color.

Color Field Features:
1. WSS 3.0/SharePoint Foundation 2010 support, MOSS/Server not required
2. Cross-browser support
3. Integrates into regular SharePoint views, no conditional formatting needed
4. Works with Expert Search to color-code your tag clouds

Requirements:
* SharePoint

The license of this software is Free Trial Software, the price is $99.00, you can free download and get a free trial.