GuidesSuit The Dark Suit The Dark Suit The dress code “dark suit” is traditionally one of the most formal dress codes, used often at weddings and other formal occasions. A “dark suit” usually refers to a dark blue or black suit, with a plain surfaced or at most, a subtly patterned fabric. The suit... Made-to-measureSuit A bespoke suit or a made-to-measure suit? It's very common for people to mix up the two, as both are garments made according to your specific measurements.