Black hair and paler skin seem to be a general effect on the homunculi of the anime. Trisha Elric in Fullmetal Alchemist has brown hair, but in the 2003 anime version, when she is "resurrected" as a homunculus named Sloth, her hair is jet black.In Fate/Zero, an unwilling Irisviel has this, when her mind gets absorbed by all the Evils in the World - Angra Mainyu.She normally hates using this, since it drives her insane, but the events of the War take a toll on her psyche.
The Devil Suit in Corrector Yui is an insta-corrupted Angel Suit.Justified in that white is the color most associated with death in Japan. While Ichigo's Super Mode turns his sword black, Hollow Ichigo's version turns it white. Inverted in Bleach - Ichigo's normal outfit is black and his Enemy Within is a completely white version of himself with black sclera.In 11eyes, when Lisette becomes Liselotte, her Elegant Gothic Lolita outfit changes from white to black.