The standard paint scheme for the Ghost regiments begins with a base coat of gray so light that it appears almost white. The Fourth Ghost’s warriors use dark orange accenting. To remind them of their lives in the yakuza, they also decorate their Mechs with full-body designs. The Fourth’s design is setting sunlight on the upper surfaces of their equipment. – Canonized by Dak, 2014.
Warhammer, Combat Manual: Kurita, pg 104