Model colours:
874 US tan earth
875 beige brown
880 khaki grey **
879 green brown
921 engish uniform
987 medium grey
Also P.U.
874 German Oche Orange
20130121 update: Bolt Action/ warlordgames Vallejo Soviet paint bundle :
- Khaki Grey (Vallejo 880): Uniform and sidecap
 - Flat Red (Vallejo 957) Epaulette Piping and sidecap red star
 - Black (Vallejo 950): Boots
 - Russian Green (Vallejo 894): Helmet
 - Khaki (Vallejo 988): Webbing
 - English Uniform Brown (Vallejo 921): Bedroll/greatcoat
 - Japan Uniform WWII (Vallego 923): Padded tunic or trousers
 - German Camo Medium Brown (Vallejo 826): SMG and rifle ammo pouches
 
While looking at Guild, I found some informative posts
Informative Tank builds and colours summer 43
http://www.guildwargamers.com/phpBB3/viewtopic.php?f=104&t=20988&p=279673#p279655
15mm soviet Vallejo colours & 924****
http://www.guildwargamers.com/phpBB3/viewtopic.php?f=24&t=25103
Super fast ww2 solviets paint colors & proceedures ********
http://www.guildwargamers.com/phpBB3/viewtopic.php?f=83&t=12864
Solviet decale & slogan info ******
http://www.flamesofwar.com/hobby.aspx?art_id=849