Polish uniforms 1939

I have a dilemma, or possibly a trilemma if such a thing exists.  I am watching the DVD “The Battle of Westerplatte 1939” and it appears that the Polish khak uniform is significantly greener than most painting guides suggest – assuming the film makers got it right and my TV colour balance is correct.

So, looking at the title photo on this post, should I:

a. Try to repaint these fellows?

b. Paint their reinforcements as their existing comrades?

c. Use a greener tint and claim it was a different issue or that colour has faded in the field?

A second question. Does anyone know which of the two tents in the photo would be more appropriate as to colour for Polish forces in 1939?