The Third Lancers are currently using a gray base color with metallic red trim.
Per FM:Periphery, page 66.
The regimental crest is a pair of gold metal lances crossing through and piercing a red, nebula-like cloud set on a black field. Unlike many regiments, the Third Taurian is very strict about where crests may be placed on a BattleMech or vehicle. The Taurian Concordat emblem must always be larger and placed in the most prominent position. The regimental insignia may be anywhere above the waist but not on the back. On the left leg of a BattleMech a warrior may paint a facsimile of any awards earned. Per FM:Periphery, page 66.