To be honest these profiles of the Yak9T with the green/black camo could be a quess only, IMHO. As a base for them could have been used images of a Yak-9T taken during its tests by the NII VVS in 1943. Also, a strong belief that the green/black camo was used for all planes made in 1943 could be the reason for..
As you may notice the camo of the plane is quite dark what can suggest these G/B colours. I would say it is incorrect and the camo could be of the DG/BG either . .
The dark tone of the camo seems to be a light trick because the camouflage was just freshly applied. Here is another pic of the same plane but taken from different angle. The camo doesn't seem to be as dark as it looks in pics above..
Here is a shot of a Yak-9T dated 1944. It is almost sure her camo was of the DG/BG colours but more faded .. I would say.
Here you are a shot of assembling Yak9T at the Factory no.153. Unfortunately the pic isn't dated but the camo of the kite looks like the grey paints were used. The next image shows the Yak-9Ts at a polar airfield. You may notice their very light tone although the one in the background seems to be darker. I would say it is caused by the snow and sunlight reflection.
The main trouble is that too many pics of Yak-9 aren't dated. Here you are pics that the russian sources date 1943. The first one shows Yak-9 at Leningrad area ( almost sure these are of the grey camo but not sure if it is 1943 ) and the second shot is dated the end of the winter 1943. I think the image can be interesting because the plane with the number 930 is wearing the grey camo I believe, while the one with the 935 number seems to be very dark. But it may be the same light trick you can see in the pic above. I mean the snow and the sunlight reflecting. Secondly if the plane would be of the G/B camo she should be painted white for the winter period. Of course, it might be the qulity of the scan. If you have a look at the forest in the background you may agree with that.
To sum up ... IMHO, in so far as there could have been Yak-9s with the green/black como, the Yak-9Ts seem to be of the grey uniform only and according to the Marshal's order no white for them in winter. What is more one of russian books for Yaks mentions that these grey colours could be obtained initially by mixing of the AMT-7 and AMT-6 paints. In the case the Dark Green and the Blue Grey colours could be of different tinges than the late AMT-11 and AMT12 giving a different effect in B&W pics.. However, there might have been Yak-9Ts of the earliest series that had been made by the mid of 1943 and painted as those early Yak-9s with the Green/Black colours.. Because there is no reference confirming the G/B camo for Yak-9T .. it is up to you only if you use colours of the early camo or not. Just my opinion.