The Steel Dragon
All Sword of Light regiments use a flat red paint scheme in the field and on parade.
Per FM:Draconis Combine, page 83 and Field Report: DCMS, page 13..
Other references: none
The crest of House Kurita is painted on each BattleMech's left shoulder, with the color of the dragon changing for each regiment. The symbol of the regimental division, a blazing sword, appears on every 'Mech's back and on the front of the right leg.
Per FM: Draconis Combine, page 83.