Personally, I'm pretty sure the spinner was black. Well the spinner doesn't show up well on any of the three lousy photos of this D.IIIa, I have a line-up photo of several Jasta 16b Pfalz and they all have black spinners.
The jury's still out about the lozenge fabric wings. I know the lower wing looks dark in the photos, but I think it could still be silver. There's definitely something on the upper left wing, which I've interpreted as a simple black 8-pointed star similar to the one on the end of the comet on the fuselage (but simply lack, not black/white).
However, I could be wrong. It's happened before !!
Greg VanWyngarden