User blog comment:WikiBuilder1147/Light World: Sleep Descent - Sleepy Status Update 2/@comment-3582436-20160602115610/@comment-1743498-20160602133808

Yeah, we happened to do a few on the spot color changes. The artist felt that giving him red-orange hair would make him look a little too similar to Ichigo from Bleach. With Magne planned to have brown hair, it made sense to give Savien a color like green to help him stand out.