Mercenaries

Devil's Brigade

Never Fear the Unknown

The Brigade leaves its units in factory primer, except for a red and black band on the right arm of 'Mechs and battle armor, the right wing of aerospace fighters, or the turret of vehicles.

Per Mercenaries Supplemental 2, page 30.

Other references:
Manticore, Mercenaries Supplemental 2 (color plates)

Color Scheme
Insignia

The Brigade's logo is a blood red, stylized "DB" set against a black circle, rimed in red. Per FM: Mercenaries Supplemental II, page 30.