I knew someone would suggest that. I’ve heard the “black and white film” argument for years now, but I don’t buy it. It smells of kefirah. The pictures clearly show them wearing black and white, so we should do the same.
As far as the trees go, think about the first ani maamin. The world is constantly in a state of creation and re-creation. It’s not difficult for me to believe that they had black and white trees in those days and that now the briah is green trees with brown trunks. But the rabbonim didn’t wear trees, so it is not relevant.