If you'd like to have full colour lighting without huge expense then Collingwood and Si-Lite do a range of RGB colour changers.  These are usually installed as a Master and Slave arrangement.  However to save costs, you can use WebBrick and Gateway solutions to just drive the Slave versions.

The Si-Lite part numbers are SL580 Master (you don't need this) and SL581(you want these):

http://www.si-lite.com/NEW%20SI-LITE%20SITE/LED%20Lights/Colour%20Changing/SL580.html 

 We've found that the 'Smooth' 'Fade' 'Strobe' and 'Flash' commands that are Master only do in fact work with the slave lights.
 

I've attached the EventDespatch file to drive these. 

 Regards

Andy