Gents, in Modelmana no.7 it is said that the kite was painted with RLM76.75,82,83 and 02.Looking at some pics of the RED13 we can see that these spots under number13 were painted with a colour which was slightly darker than the one used for the fuselage and the fin+rudder.So it wasn't RLM76/78/65 rather.In J.Crandall's book these colour profiles show us that it could be RLM02.Looking at the B&W Red13 general view I believe it was the colour.