Default [Q] simply "black" air-command and/or pen-window frame?

There are quite a few themes out for air-command but they are all too fancy for me.

Unfortunately I couldnt find one that simply inverted the colors / made the aircommand black and the pen-window frame too. (or at least dark grey, etc..)

Is there such a theme out, and if so please point me to it =).

Or is there some "tool" out there yet for easy modding these?

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Or if nothing helps: Which files are the ones that need to be changed in the framework or systemui or whatever? Hopefully only some xml changes lol... but I guess you need to switch out some png's too?