^^ That'll be it Felipe. It's the way the colours don't go because the walls seem purple at night so there's contrast, but this way they just clash. There's also something about the general proportions (and perhaps lettering?) of the sign which doesn't really work for me either; I think the board is too flat and the letters are too 3D. Not wishing to complain or seem pedantic, this is just how it looks to me. The building itself, along with the others in the expansion, looks really nicely done.