Basic testing of RGB support

I've had a shot at RGB support. It does seem to work, although there is a possibility of a `TypeError` needing to be handled most likely.

![screenshot 2014-02-22 22 54 06](https://f.cloud.github.com/assets/246103/2239097/425bc070-9c14-11e3-801c-9df87e5adf7a.png)