Well, the Roland's fuselage was constructed by forming strips of plywood over a wooden buck, with a canvas covering. Any framework would be hidden. Earlier pictures of this aircraft don't show any sort of line on the fuselage, so there must have been 2 colours.
If you look at the third paint scheme, that's one with a similar paintjob, but on the archive photo, the brown/green looks darker.
Anyway, thanks for your effort.