Mercenaries

Black Heart Roses

Marriage of Convenience

The Black Heart Roses use no standard color scheme. Instead, individual 'Mechs commonly employ the colors of other famous commands, with the unit insignia replacing the original markings.

Per Mercenaries Supplemental 2, page 23.

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

Color Scheme
Insignia

The unit insignia – a red rose on a black heart – replaces the original unit or house markings. Per FM: Mercenaries Supplemental II, page 23.