The Devil’s Advocates use camouflage appropriate to their mission while in the field, but also sport a parade scheme of basic black, with red and gold highlights that vary in design for each warrior.
Per Mercenaries Supplemental, page 30.
Other references: Hercules, Mercenaries Supplemental (color plates)
The unit insignia depicts a grinning devil, wielding a sword and shield decorated with a yellow and black radiation symbol. Per FM: Mercenaries Supplemental, page 30.