No, this doesn't involve sitting on dirty escalators. Compared to white jeans, I think it's even harder to wear red trousers since they grab people's attention by the horns.
While other people just pair them with a white or other neutral-colored shirt, this bloke has bravely — yet also quite sensibly — tamed the wild color by topping it with a sobering dose of dark blue. Instead of clashing, the two colors come in equilibrium.
Equally important to his outfit is the matching of his brown cap with his beige sneakers, which helps him avoid looking like a two-tone flag. That or your other choice of slashing your pants.
Kudos goes to Fred.