The Windsock Special on Voss has excerpts from the report by Lt. Barfoot-Saunt, and a paragraph from an incident report supplied to the Lt. by the Area Intelligence Officer (not complete, but cost me considerably less than $4000

.
In one part, the general description is that it is "camouflaged green on the upper surfaces and sky blue on the lower."
The incident report goes into more detail, as follows; "The machine features a new attempt by the enemy at camouflage. The entire upper and side surfaces are doped in various shades of green, blue and grey which takes the form of streaks applied at various angles - vertical on the fuselage and slanted on the tail. The upper and second wing have not been salved but the streaks on the bottom wing are just off the vertical, slanting slightly to the left. Lower surfaces are greyish blue. Upper surface dope is of poor quality but the fabric is good."
Basically, as described by Tobias, and in the "DRI Special", the 2 FI prototypes of Voss and MvR were streaked olive-green over turquoise, where MOST production triplanes were streaked over clear dope, with turquoise undersides.
As for yellow nose or tail - there's always been a lot of controversy over that. Alex Imrie has championed the yellow nose, based on yellow being the Jasta color, and the fact that yellow photographs dark on ortho film. In all photos I've seen which show both, the cowling is dark and the rudder very light (almost certainly white) - they can't both be yellow! Since such coloring apparently isn't mentioned in these reports (although the cowling shape is described), I tend to doubt that either was actually yellow.
Rich