Gentlemen,
its very easy, because in Germany during the war ( except for the last phase of WW2 ) all things were regulated. For color question in the Luftwaffe we have the LDv ( LuftwaffenDienstvorschrift) 521.1 :
Pre-war splinter scheme 61/62/63 over 65
Very early fighter biplanes, experimental aircraft 63 overall
Two-green splinter scheme - all aircraft except seaplanes until the ned of 1939, later mostly bombers, transports and ground attack a/c 70/71 over 65
Sea scheme - seaplanes 72/73 over 65
Fighters, until ca. end of 1939 70/71 over 65
Fighters, French campaign and Battle of Britain many different, but often 70/02 over 65
Standard two-tone grey scheme, fighters 1941-1944 74/75 over 76
3-tone desert scheme - aircraft of the African campaign 79/80 over 78
2-tone "Tunisian" desert scheme 79(brown) over 78
Late-war schemes, fighters, 1944-1945 many different combinations of colours from the 80-series, i.e. 81/82 over 76, 82/83 over 76, 81/82 over "84", 82/83 over "84", etc.
Nightfighter scheme 75/76l
hope it helps
Thomas