Jayco had many fading problem with the chocolate brown front caps on their Eagle series trailers. The fading was not due to paint issues, but rather problems with UV and gel coats. After a couple of years of expensive warranty issue, Jayco went back to lighter colors in the Fall of 2014.
On the Jayco forums some people were using infrared thermometers to measure the surface temps of the chocolate brown caps, where surface temps were running about 200F. The lighter color front caps were running about 120F.
The lighter colors keep the trailers cooler in the summer months.