I know little to nothing about this one but after looking at the photos, I'd say it's still in the over-all British PC-10 color, basically and olive drab kind of thing.
Interesting subject though
This one looks like it
might have yellow wings and a gray (?) cowling? The rest is probably PC10
And a few paintings, for what they're worth-

I'd put my money on that last painting being correct based on my assumption.
For the color PC-10, look here-
World War I colour charts?
Some of the photos are gone but I don't know which ones they were

Maybe this is one?

That's a real piece of PC10 fabric I have with several color matches called out by a number of sources.
I believe that there's a pretty good chance the US might have been using British red and blue (VR2 & VB3) for the markings too.
The best place to ask is here-
The Aerodrome