We made a one-off test of Bengle's sculptural wings design, in black. The reflectivity is not the same as silver, but still… it has a pretty effective Batman-like goth feel to it. If the metal body were black, instead of white, I'm not sure this would necessarily work well.
Our upcoming DE1 v1.46 is mostly-black, but with a silver drip tray. I'm guessing that silver wings on Bengle, on a black body, might be a good combination.