Well, you could mix it from blue and red. But if there are no subjects that are actually violet I presume you lack the incentive to incorporate this color. Viol

Well, you could mix it from blue and red. But if there are no subjects that are actually violet I presume you lack the incentive to incorporate this color. Violet cloths result in violet subjects etc. The observation of lack of violet before 19th century is interesting no matter which pedestrian explanation is the most correct one.