It would be insanely difficult to determine with 100% certainty which colours were used on JG 54's Fw 190s, but it is a viable assumption that the older "green colours" RLM 70 and 71 were used. The "tan tone" could be RLM 79, but I have also seen a profile of a Bf 109 G-2 from summer 1942 which - according to Claes Sundin - used captured stocks of soviet AMT-4 (a light green which resembles the spring/summer environment of the birch woods of north-west Russia and the Baltics) so it might be possible that other captured soviet colours were used.
But there will probably never be complete agreement on the tones as the photographs of the time weren't particularly favoring colour research.
