The aircrafts of the German LW (Luftwaffe) in WWII were painted with standardized paints. The colors of this paints were registered as RLM (Reichs Luftfahrt Ministerium). I

The RML - Air Colors numbers are:

RLM 00 = Model Air 71058 / 70510 - varnish
RLM 01 = Model Air 71063 - Silver
RLM 02 = Model Air 71044 - Light Grey Green
RLM 03 = Model Air 71065 - Steel
RLM 04 = Model Air 71078 - Gold Yellow
RLM 05 = Model Air 71106 - Yellow Azure

RLM 21 = Model Air 71001 - White
RLM 22 = Model Air 71057 - Black
RLM 23 = Model Air 71102 - Red
RLM 24 = Model Air 71090 - Blue Angel Blue
RLM 25 = Model Air 71014 - Gunship Green
RLM 26 = Model Air 71105 - Brown
RLM 27 = Model Air 71033 - Ochre

RLM 61 = Model Air 71042 - Camo Black Brown
RLM 65 = Model Air 71008 - Blue
RLM 66 = Model Air 71055 - Grey Green
RLM 70 = Model Air 71021 - Black Green
RLM 71 = Model Air 71015 - Olive Grey

RLM 73 = Model Air 71016 - US Dark Green
RLM 74 = Model Air 71054 - Dark Grey Blue
RLM 75 = Model Air 71052 - German Grey
RLM 76 = Model Air 71046 - Pale Grey Blue
RLM 78 = Model Air 71101 - Blue
RLM 79 = Model Air 71034 - Sandy Brown

RLM 80 = Model Air 71017 - Russian Green
RLM 81 = Model Air 71043 - Olive Drab
RLM 82 = Model Air 71022 - Camoflage Green
RLM 83 = Model Air 71011 - Tank Green
RLM 84 = Model Air 71103 - Grey