Lambda Spina has adopted a blue and silver paint scheme.
Per FM: Warden Clans, page 71.
Thresher, CB: Miniatures Rules (p 29)
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 Starstrike insignia is a missile, its front half bulging into the forward half of a diamond shark, rocketing across a diamond-shaped field of stars. All Lambda Spina warriors may paint silver diamonds on the side of their 'Mech, battle armor or fighter craft, one for every Point's worth of kills they accrue.
Per FM: Warden Clans, pages 66 and 71.