I would like to get a few of the third option... in real life. Seriously, if I were to truly hazard a guess, I would say that options that came with the chair would be a good idea. For instance, a Purple might have extra dye slots for more fine control of coloration. Or a different style of the same type of item that would come as a green. (i.e. White is an unadorned chair, Green an upholstered chair of some type, Blue a recliner or wingback, and Purple is throne-like.)