Predator Galaxy uses a dark blue and green paint scheme.
Per FM: Warden Clans, page 69.
The Clan Diamond Shark insignia is displayed on all war machines in the Clan Touman. Galaxy insignias may be painted on a 'Mech or fighter, but always lower and smaller than the Clan insignia. Warriors with at least one confirmed kill may paint shark-like teeth in an appropriate place: the nose of a fighter, cockpit of a 'Mech, front of a vehicle or faceplate of battle armor.
The Galaxy insignia is a faceted shark's head thrusting upward through a circular field.
Per FM: Warden Clans, pages 66 and 69.