It's own mother railroad when they had renumbered it to make room on the roster for new diesels because they didn't think the steam gig would last, and when the budgeting was much tighter than today.
Someone had the bright idea to just put that color on who thought it looked good and didn't care about making the Locomotive historically accurate (Just like the current UP steam manager today. Just watch and you'll see. The 4014 will get the same treatment of silver tires and chromed out wash plugs with flags and heralds and probably more.)
Prototypical is how the loco looked in service, which was the grey/graphite color, not a flashy shiny silver. ( Not necessarily dirty) It's all good on the loco in game, but put that crap on the real thing (which commands more respect than what it has been dealt in the 70s and 80s and since the start of 2012) and it makes my blood boil. It was built in Black with no whitewalls or chrome, and that is the way it looks best. Classic, Powerful, Sleek, Swift.
The mother railroad really doesn't have much say in or really care what the locomotive looks like, they just want a steam engine to pull the train so it's up to the guy in charge in Cheyenne how it looks.
