Hi KL,
basicaly I agree with you - official scheme was black & green.
Here are another photos of the same plane I have found on web:
I havea to admit that camo on the plane (front & middle sides of the fuselage, wings, engine gondoles and vertical stabilizers) quite well fit to official camouflage template. However, the black is missing around the horizontal stabilizer root. Fabric on the rear left side of the fuselage is missing, we can only guess whether black was also there or not.
My original interpretation was that originally dark green (AIIz?) plane was for some repainted in the filed conditions to the new scheme, but black either poorly covered or it was mixed with new AMT-4 green to get enough paint or something like that. Those photos are usually dated to summer/july 1941 - time when Soviets at the fronts had completly diffrent problems from looking for perfect black.
Where is that color scheme from, please? The fuselage star is missing there - same like on that Yak-4. AFAIK there should be two red stars - on the rear fuselage side and on the tail.
However, if we suppose that plane was camouflaged already in the factory/PARB and different dark shades are only matter of light conditions and/or optical illusion then, of course, there should be only two colors - green (AMT-4) and black.
EDIT:
Here is reworked version to fit official NKAP template:
Regards,
66misos
Another photo of this machine. It looks almost like a 3 color scheme here.