do not worry about the yellowish M1943...
anyway in the past I had a so called historical expert... (funny thing he is a lawyer I am a Military Historian...) that say the green one were already used in Normandy... the change of unoform is not very well known, a lot of illustrations are based on Normandy, the cut of the unoform is not completely different (especially in 28mm), and so well you painted well!
There is also an old reference from the TMP of a chap who bought one of the prop uniforms made for Band of Brothers (M1944) and then realized that the green was fading to yellowish green quite quickly. He did not know if that was something real, or the stuff was just bad quality...