Sylvain,
That would be Light Stone #61. When the brunt of the fighting was in North Africa and many of the Commonwealth armies were dependent on Canadian vehicle manufacture, many if not most vehicles were painted Light Stone. Not all reached North Africa, those which were diverted to other theatres were repainted. There is no RAL equivalent. You could go to the expert on paint colours Mike Starmer - he has recipes to mix the right colour - see
http://www.mafva.org/british-vehicle...flage-1939-45/ - or buy his books.
Read more on my webpage
http://www.mapleleafup.nl/cmpvehicles/paint.html
HTH,
Hanno