Can't help on the colors but FineScale did two articles on painting uniforms:
July 2002: Mixing acrylic paints for WWII military uniforms,
Oct 2002: Painting camouflage uniforms
The July 2002 issue lists some common color combinations.
Good luck,
Rich W
Indy - a pictorial index for the FineScale magazine
www.rmwenterprises.com