Make channel name visible when app is inactive and active text/background are the same color

When app is inactive and the channel highlight is removed, the channel name is not visible if the background and text are the same color.

Bad:
![screen shot 2013-07-01 at 11 42 22 pm](https://f.cloud.github.com/assets/763550/734670/9043d0aa-e2d5-11e2-8ed1-b7cdffd9e87e.png)

Good:
![screen shot 2013-07-02 at 1 15 01 am](https://f.cloud.github.com/assets/763550/734688/66945774-e2d6-11e2-8b94-b88e5edb38b0.png)