cama came in with:
My Google-fu is strong...

<== Master Cama-Fu!
Google French Infantry 1940:
Well found! The re-enactors in the picture give a pretty good impression of French
Khaki. More green than Soviet Khaki, but not a pure green color.
I think Polly-S "French Khaki" is a good match. But after 7 months of "sitzkrieg" in the
field, there might be some uneven fading. Still, can't go much wrong with a decent
French Khaki.
The picture of the historical uniform and kit shows that the French Khaki seemed to fade
towards a tan tone. I would suggest doing the trousers in more of a tan tone would
match this well, and give a sense of character to the figures.
I might note that this trend in French uniforms is rather the opposite of some other
armies. In the Red Army, for example, it was the tops that were known to fade more
than the trousers. But the French provided a particularly sturdy coat as a part of the
every day uniform, and it seems to have held its color well.
RoughRIder replied:
My main question about the french was did they have green helments or were they
some other color like grey or black.
As with most combattant armies, I think the intention was that the helmet would be the
same color as the uniform. But since the material was so very different, it comes out
looking like a rather different color. Notice from the picture above that the helmets look
almost gray. They aren't. They are khaki. But they take the light very differently.
For my armies I almost always find a different color for the helmets because of this
material difference. For my French, I use Tamiya "Khaki Drab". This is the color that one
might paint a British ETO vehicle in 1944. Makes a nice grayer-green for the helmets. I
also tried Modelmasters "Medium Green", but didn't like it so much. Also, I find the
Tamiya colors have more of a "satin" finish, not as flat as Polly-S, but still not full gloss.
That helps the helmets catch the light a little differently.
Just my own experiences. Your mileage may vary.