Sword of Orloff
The Head Hunters paint their BattleMechs using desert tan on the legs and lower torso, and the upper torso, arms and head in an olive-drab green.
Per Mercenaries Supplemental, page 38.
Cronus, Mercenaries Supplemental (color plates)
Their insignia is a blazing white skull with gold shining eyes set atop crossed silver swords on a purple disc. Per FM: Mercenaries Supplemental, page 38.