Slow Death of the Moon
The Twelfth Ghost uses a color scheme of dusk-gray and black accents. The unit's yakuza design is a band of stars that stretches from the upper right shoulders of its 'Mechs, across the torso and down the left arms and legs, broken at regular intervals by twelve moons in various stages of eclipse (individual MechWarriors record their BattleMech kills by adding red stars in the design). A fully eclipsed moon surrounded by an aura of light appears on each 'Mech's chest.
Per FM:Draconis Combine, page 120.
The Ghost regiments do not have a regimental crest, as that designation serves as an administrative classification more than anything else. Per FM: Draconis Combine, page 112.