Consider customizing navbar gradient colors

Originally reported on Google Code with ID 209

```
Consider customizing the navbar gradient colors.  This may require integrating LESS
into the runtime process.  That may be more work than it is worth, at the moment. 
Use the Moxie mx:doc code as a reference.
```

Reported by `James.Moger` on 2013-02-19 14:36:43
