A closer look
United Parcel Service painted all of their delivery trucks Pullman brown in 1916 because it was the most effective color for hiding dirt and road grime; back then, most roads were unpaved and muddy, so a brown vehicle would look reasonably professional even after a grueling twelve-hour shift of delivering packages; the specific shade is actually trademarked, meaning no other delivery service is legally allowed to camouflage their filthy vehicles in quite the same way, which is a brilliant corporate strategy that essentially boils down to admitting you are never going to wash your company fleet, so you might as well make it the exact color of the mud it drives through on a daily basis
