Just a nice edgy DRK glamour. Jet Black dye gives it a bit of an extra "shine" if that's your thing but really any dark dye looks nice. If you're looking to save some gil, Gunmetal Black looks more or less identical to Jet Black on most of these pieces.
The Weathered set can work fine too if you're feeling lazy but you'll need to get the Idealized chest/hands from Memoria EX if you're after maximum edge.