Hi,
GW Graveyard Earth gives decent resemblance to Standard Battledress, & Kommando Khaki makes for good webbing. I used Citadel paints only (Just as an experiment), to paint my Valiant British Tommies & they looked really good, as well as having a good resemblance, despite GW having a very small colour range.
This are the colours I used for my Tommies:
Battledress- Graveyard Earth
Webbing- Kommando Khaki
Helmet- Catachan Green
Rifle Stock- Bestial Brown
Rifle Metal / Bayonet- Boltgun Metal (Mixed with black)
Flesh- Elf Flesh
Water Bottle / Officer's Boots- Scorched Brown
Boots- Chaos Black
Scrim / Leaves- Cammo Green
The only problem was Citadel paints being water based, & they can tend to be quite thin. Sometimes 2 coats may be required.
Hope this helps