This aircraft was heavily souvenired before those photos were taken. It had also turned over in the crash. In the side view, on Page 22 of the WNW instructions (also on Page 4 of "Pfalz D.XII at War", Datafile 146), the "band" looks more like a strip of color torn off the surface. It isn't straight, or even. If you don't have either of these, you can still download the instruction booklet from WNW's site.
I believe the colors as shown were "reconstructed" based on what is known about the unit markings.
Rich