We are a manufacturer of UL listed outdoor enclosures. We have always painted our products gray, the same as all other electrical enclosures. I have a customer who wants a significant number of enclosures painted green. At first I thought why not, but then I thought, why are enclosures always grey? Is there a standard that I am missing? I checked the UL standards and I find no mention of color when paint finish is discussed and I can't find any obvious reference to enclosure color in the NEC. Does anyone have any thoughts on this. Thank you.