There is some confusion over the camouflage you are worried about.
It is usually assumed that the mottle is RLM 75 over an RLM 76 base. Georg Czypionka, who flew with NJG 11 remembered the aircraft being finished in 'medium grey', presumably RLM 75, with a 'night fighter scribble' in 'light blue', presumably RLM 76, all over. This would in fact be a more or less standard night fighter scheme for the period. The undersides were then painted black, RLM 22. He also remembered that the tops of the wings (and horizontal stabilisers?) were then roughly over sprayed in a 'dark green', they never had the splinter camouflage usually shown on decal sheets. This dark green was probably the green version of RLM 81, often still called RLM 83 in most model paint ranges. There is one photograph taken from the rear that shows the upper wing surfaces to be finished in one colour, no splinter.
You have choices. I have to say that in the well known photograph of this aircraft, taken from the port front quarter, before it received its British markings, the RLM 75 base with an RLM 76 'squiggle' looks entirely plausible....to me. The squiggle/mottle of which ever was the second colour applied is so dense that it really is difficult to tell.
The black undersides are a no brainer, but the tops of the wings and tailplane? One colour? certainly. Dark green, as per Czypionka's memory seems reasonable. Whether applied over the RLM 75/76 night fighter camouflage, and how well, depends on how much you trust Czypionka's memory.
Cheers
Steve