I visited Mike Starmer last week-end with a selection of my parts in an attempt to confirm Khaki Green No.3 and identify the darker overpainting.
Mike has an amazing eye for colour differences (and ability to compose comparable mixes).
As I understand it, Mike is now confident that the 1940 era KG 3 can be replicated but the darker colour is proving more problematical. It is not the Dark Green No.4 that I supposed and is not dark enough to provide a contrasting disruptive effect. It may be a "Light Green" or Mike wondered about a locally obtained French Colour.
I will try to match it for my restoration but it seems unsafe to rely on as a general reference.
Here's a picture of Mike getting down to work looking for original colour on the front mudguard.