As the downed plane is described in detail … Undersurface light blue, mottled with white, continuing up the sides of fuselage and fin. Upper surfaces dark blue mottled with grey and white.
There are so many different words used in these reports to describe Luftwaffe colours that it is hard to believe that investigators were using a standard reference (unfortunately!). It seems each man was free to use his imagination in naming the colours and leaves us trying to guess what they meant.