It's on that site. At least some of the stuff is listed in MM colors under the Guide to Painting.
http://www.usarmymodels.com/guidetopainting.html
For the Olive Green cotton stuff such as the M1943 uniforms I like SAC Bomber Green in the MM line,or from Humbrol I use Light Olive or Army Green. For the wool trousers, I like Field Drab from MM. For the wool shirts worn with the wool trousers Humbrol Khaki or Khaki Drab is a good choice. For the Tanker winter uniforms, M1941 Field Jacket, or Paratooper M1942 unforms some good choices are: from MM, SAC Bomber Tan, or IDF Khaki; from Humbrol Middle Stone (not the new Mid Stone) or Dark Stone work. MM Olive Drab 319 or faded Olive Drab work good for the HBT fatigue uniforms.
F is for FIRE, That burns down the whole town!
U is for URANIUM... BOMBS!
N is for NO SURVIVORS...
- Plankton
LSM