Mercenaries

Prey's Divisionals

Family in Crisis

use a color scheme of black and blue with red highlights.

Per Mercenaries Supplemental 2, page 55.

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

Color Scheme
Insignia

The battalion's insignia is the letter "P" set inside a sideways letter "D" that looks like a mouth – complete with bloody fangs – in the process of devouring the "P". Per FM: Mercenaries Supplemental II, page 55.