The thing about all WWII paints is they were lead-based and faded really quickly in the sun so there were wide variations of colors and shades out there. I wouldn't be too picky and choose a color you like but use it on everything from a given nation. By DDay the British no longer repainted lend-lease gear from the US and left them Olive drab and the Russians were all over the place and used whatever they could mix up.
When you go home, tell them of us and say, For your tomorrows these gave their today. ~J.M. Edmonds