That's the one Wojtek!
Yes, 7/JG26 had brown numbers, but the tones in the pic suggest black, possibly red. The only decals I had that were the correct size were black, so...! The pic I used was in Caldwells JG26 book, where there are other pics of 7/JG26 aircraft with definite brown numbers.
I've seen this pic in more than one book, where it is normally described as a 7 Staffel machine. But one book put it as a FW190 A7, which can't really be right, as the ORBAT for JG26 for the period lists 190A8's.