More I try to understand this subject, more my head-hake increases.
I tried to work on my pictures, just to figure-out.
Some grey after the white band, some more kaki-green on the fin (evident on pictures but, difficult to understand, normally there was an hard separation between the camou colour and the yellow, later covered with grey)
Not to difficult to adjust the right side as well.
But what about the area I identified with a question mark? In order to be lighter then the grey on the cowl, one option could be to use under-wing colour for that blotch, as seen here, first in colour, then converted in grey scale.
But so far I have never seen a camou arranged like this.
I will sleep on this and take a decision tomorrow.
Alberto