Luftwaffe BoB wing camouflage

First time poster....

I've been looking for info about Luftwaffe wing camouflage at the time of the Battle of Britain. I seem to be able to find a lot of info on profiles - fuselage - but little on wing tops. I have a specific question: were the camouflage patterns fixed across the entire luftwaffe? specific squadrons?

I had just assumed they were individual up to the plane crews, but I was looking at a photo of some 110s from Erpro 210 and two of them seemed to have identical patterns. It was hard to tell if that was true of other planes (not clear in the photo) but some looked like they might.

Thanks,

Phil