Only three colours are used in these camouflage schemes: green, red-brown and black. They, and their corresponding US Federal Standard 595a numbers, are shown on the table below. This also has model paint references which more or less match the FS-595a colours.
The colours indicated are not necessarily also correct for other NATO countries using these, or similar, camouflage patterns. For example, in American service a colour called "green 383" is used, which is decidedly darker than the German Bronzgrün (bronze green).
US Army http://www.colorserver.net/showcolor.asp?fs=37030+30051+34094
Black 37030 or 37038 -- XF-69
Brown CARC 383 30051 -- XF-64
Green CARC 383 34094 -- XF-67 (or XF-61)
HEER (Germany) + Pays Bas http://www.colorserver.net/showcolor.asp?fs=37038+30045+34102
Black RAL 9021 (FS37030 Officiel) mais plus 37038 -- XF-69 http://www.colorserver.net/showcolor.asp?fs=37030+37038
Brown RAL 8027 (FS30051 Officiel) mais plus 30045 -- XF-68 http://www.colorserver.net/showcolor.asp?fs=30045+30051
Green RAL 6031 (FS34094 Officiel) mais plus 34102 -- XF-67 http://www.colorserver.net/showcolor.asp?fs=34094+34102
France http://www.colorserver.net/showcolor.asp?fs=37030+30145+34110
Black -- XF-69 -- 37030
Brown -- XF-52 -- 30145
Green -- XF-5 -- 34110