I looked for info on early OD colors. Nothing! I though it might be in Monogram's USAAF/USAF color chip book.
I have a feeling, if it's there and not just my imagination, it's in this book,
The Official Monogram US Army Air Service & Air Corps Aircraft Color Guide, Vol 1, 1908-1941: Robert D. Archer: 9780914144465: Amazon.com: Books
I can't even find any reference for the book I have, it's by Monogram and is a thin spiral bound book of color chips, I think all the color chips from the three full size US volumes they made. It even has Dupont British color chips in it![]()