The good name is "Ombre calcinee"
(litterally:"Burnt shadow")It look like a dark earth.I have an old paint
chart were this color is referenced as Humbrol 98.I do'nt know if this
reference still exist .If you want ,i can send you a scanned copy of this chart
I also have pics,profile .. for this plane,i just need time to scan it (no scanner
at home )
Best regards P Medard