Surprising purposeful public art/graffiti in Georgetown
But the local preservation law doesn't cover "paint" choices on facades, so this might be "legal."
A similar case, but more bold and in your face, but not in a historic district or in a residential area where walking predominates, is how Chris Brown did over his garage-abutting retaining wall in Monster graffiti, which got his neighbors up in arms in Los Angeles.
But I wouldn't be disposed to paint my house in a similar manner.
No sidewalk... Image source.