Dark suits, what are the rules of dressing and what brands do you recommend?

How to wear a dark suit (2) Dark gray suit

Dark gray suit with double chalk stripes for an overwhelmingly dignified look

Double suits can also be easily incorporated in a subdued dark gray. For a more grown-up look, try a classic suit with a generous sizing.

Business styleIf you want to wear a gray suit style like this

A gray suit made of flannel material with chalk stripes of a pitch that is not too assertive can be easily incorporated into a business style without being too showy.