Hallo Akonti,
I'm afraid you got me wrong a bit.Simply the names of RLM84 and RLM99 are incorrect.These names were used in 80's to call new identified colours that were used for painting of Luftwaffe planes.But these aren't listed on RLM files.
As I said the colour named "RLM99" was a preservative for parts of plane structure that were unvisible from outside.So it wasn't used for outside painting of fuselage,wings etc... rather.
But the colour so-called RLM84 is something different.It was a paint which was used for outside aircraft painting.And this colour was like the "Sky type S" or "Duck Egg Blue".Have you seen these colours? For sure yes.These have yellow-green tonality.Therefore it's more likely that the fuselage of Black3 was painted with the paint but not "RLM99" and had the yellow-green tonality insted of the one which we can see in the A profile.
I agree the camo of Black3 is quite unik but there were some planes painted with the colours for instance: Fw190D-9 of I/JG2 White15 Werk nr.600651 at Merzhausen airfield in December 1944.Often,the camo pattern was called "technical".The 3-view profile of the Black3 you can find in AJ-Press book "Painting and marking Luftwaffe 1935-45" vol.4 by Robert Michulec.
There some Fedaral Standard numbers for "RLM84" : FS 34432, FS 34554, FS 34583-FS 34672
Taking all mentioned above things into consideration I think that the Black3 had its fuselage painted like the B profile shows.Certainly if you like the A profile there is no problem, you can paint your model with the paint of that tonality.It's up to you only.What is more ,at the end of WW2 Luftwaffe had many truobles with almost all ( fuel,ammo, bombs ) also with paints,so there is possiblility that the fuselage of Black3 could be painted like A profile shows.But I believe that it was like in the B one.
regards,