If you click on the search box at the top of the screen, then click on "advanced search", and search for "paint color" in the Airstream motor home forum and sub-fora, you should get 39 hits. One of these may give you the information you require.
Nick Crowhurst, Excella 25 1988, Dodge Ram 2500 Cummins Diesel. England in summer, USA in winter.
"The price of freedom is eternal maintenance."