Hi,
There is always some sort of discussion going on about paint colours . I like to go straight to the original source as a guide e.g. the original faded paint found on the vehicles .
On two of my Morris Commercials from 1940/41 the base coat was a medium green with a grass/ olive hue to it . Over this green a very much darker green has been hand brush applied in wavy patterns .
British G3 was apparently a very dark green as I have Mike Starmers colour chips here to look at . I think the lighter overall factory applied green is G5 .
Anyway have a look at :
http://www.geocities.com/vk3cz/Paint.html
Mike