The Lyran Guards use a blue-and-white paint scheme for ceremonial duties.
Per FM: Lyran Alliance, page 74.
The Lyran Guards’ insignia depicts a stylized white horse head that appears on the left leg of BattleMechs or the left side of vehicles. Regimental insignia appear on the right leg or side. As if to mock the charges leveled against the unit on Suk, the Slashers’ insignia dpicts a bloodied knife with an ear impaled on its point. Per FM:Lyran Alliance, pages 74 and 81.