Something along the lines of this would be cool. I can't pixel edit for the life of me, so the above referential image was all I could manage. I doubt the developers have any time to be taking trivial suggestions like this, but perhaps sometime in the future when there are less important matters to tend to.
At first I thought this would be a waste of time, but you were so polite.. I think more cosmetic items will be making their way into the game, and they definitely should be. I have no idea whether they'd take the time to implement this specifically.