http://www.uprr.com/aboutup/history/loco/locohs03.shtml or http://www.uprr.com/aboutup/history/loco/index.shtml
Retaining something in these colors, which actually wore the scheme, seems to me the best justification for their "heritage" attempts. Good links! Boxcab E50
I used to spend many days in Cheyenne and the surrounding area in the late 80s and early 90s working as a field engineer on the Minuteman and Peacekeeper missiles that were sprinkled around there. Used to hang out at the Albany bar, right next to the station after a long day in the field. They had the best Rocky Mountain oysters around!