Help with Powerline customization basics?

I made this thread on how to install powerline, and as beautiful and as awesome as it is, I’m still having a hard time wrapping my head around customizing the damn thing, because the Powerline website doesn’t show practical config editing examples. That or I am stupid, one of the two.

Can somebody tell me how one goes about editing Powerline’s config files (per-user in ~) to change the colours shown in the Bash shell? Also, I want Powerline to act as Bash by default when it displays user @ computer.

I didn’t know where else to put this, so I have it here instead. Move this thread if necessary.

So uh, nothing, hm? That kinda sucks, considering something more distilled and very A-B-C would help more than just myself.