All Sword of Light regiments use a flat red paint scheme in the field and on parade.
Per FM:Draconis Combine, page 83.
Dragon, FM: Draconis Combine (plate 7)
Wasp, Camo Specs (p 6)
Dragon, Classic Battletech Box Set (back cover)
Dragon, CM: Kurita (p 26)
Dragon, CM: Kurita (p 29)
Guillotine, Dragon, Quickdraw, Panther, CM: Kurita (p 90)
Wasp, CM: Kurita (p 95)
Dragon, Spider, Jenner, Marauder, Hunchback, Panther, Cyclops, CM: Kurita (p 106)
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. Its symbol is the Kurita crest with a golden dragon. Per FM: Draconis Combine, pages 83 and 86.