Well on that image i made you can clearly see that it nowdays got
multiple colors, even if you look at the photo i turned to black and white. How ever
on those ww2 images it got propaply just one color. And if you take a look
to that photo where is prisoners on it, you see that its destroyed quite
badly. So it must have be reconstructed after war and most likely
repainted with that green as everything which comes from Soviet union
and is made in somewhere 50's is that T-34 green.
I have working on woodworking company when i was teen and all circular saws,
grinders and drills which were bought from DDR got that exactly
same green. And i allways used wondered how they can have exactly
same color no matter whats the manufacturer was. But Soviet Union
have propaply just sold all that paint to companies after there was
nomore need to paint tanks and planes. And after that used the rest of
it to public buildings. That must have been tons of green paint they have
had after world war 2.