Mercenaries

Narhal's Raiders

Bloodied but Unbroken

The Raiders use a brown and green camouflage pattern, which they change only when it clashes drastically with the terrain in which they are currently operating.

Per FM: Merc (revised), page 92.

Other references:
Spector, FM: Mercenaries (plate 15)

Color Scheme
Insignia

Their insignia is a horned animal skull on a white-rimmed blue circle. Per FM:Mercenaries Revised, page 92.