A colorway is a specific color scheme. Most are only used one but sometimes colorways may be revisited again but with subtle variations (for example Classified Pheyden Mk. II Klace has gray eyes while Classified Pheyden Mk. III Klace has teal eyes).
These colorways where officially named and sold by Onell or one of the sister companies:
These colorways were created by fans via partswapping and brainstorming, mostly originated from the now-defunct Glyos sub-board of the October Toys Forum: