Dynamic header color

First of all, awesome framework!

I was wondering if there’s a way to dynamically change the header bar’s color or class (e.g. replacing bar-positive to bar-dark) based on the current state?

I tried to check for the current state in the run block and bind it to a $rootScope variable, then use it on an ion-nav-bar’s class, but it doesn’t seem to work.

Do you guys plan on including such feature, and is there a way to do it now without forcefully overriding things?