Nederlandse Modelbouw en Luchtvaartsite
Dutch Modelling and Aviation
RLM Colorlist
http://rhorta.home.xs4all.nl/jgrlm.htm
....Like all bureaucratic organisations the Reichsluftfahrt Ministerium (State Ministry for Aviation), or RLM for short, tried to standardize as many things as possible and one of these was colors of paint, which were known by a RLM number. For example late war dark green being RLM 83. In the following list are the most important RLM colors, their official description, an approximate US Federal Standard color code and sample.