Possible Clues:

• (Army) uniform colour
• The British might need just a shade of this to get into army transport, by the sound of it
• Military uniform cloth - colour
• Type of casual pants
• Gives Sikh a kitbag holding military-type clothing
• Desert uniform color
• Habit Tommy got into
• Can't start the army vehicle without it, by the sound of it
• Camouflage colour
• Olive brown