nice looking little stuart,
british khaki drab is a tricky one to find,
in my opinion, the best out of the bottle match is revell airbrush colour nato olive,
tamiya khaki drab is also pretty good,
tamiya olive drab can be used, but its best to lighten it a bit, and can represent faded khaki quite well,
one thing to always remember is no two vehicles were the same shade, the effects of weather, sunlight etc can have a considerable effect on the paint colour.
one tip also, when choosing your paint, do so in natural light, artificial light can also make a colour seem totally different!
cheers
joe
"The machine gun is a much overrated weapon" Field Marshal Sir Douglas Haig,Somme,July 1,1916
"Remember that you are an Englishman, and have consequently won the lottery of Life" Cecil Rhodes