The Marauders’ parade colors are light blue with gray and white to create an urban camouflage scheme, though changes occur with the terrain during combat.
Per FM: Merc (revised), page 90.
Dervish, CM: Mercenaries (p 110)
Their insignia is a red disk surrounded by the white outline of a snake on a yellow crest. Per FM:Mercenaries Revised, page 90.