Health and Beauty Coloration WELLA professionals Color Touch Semi-permanent Color without Ammonia Get real, natural hair color results with Wella Professionals Color Touch Pure Naturals demi-permanent color. Color Touch was developed to match the Koleston Perfect Color Palette to allow for quick, low-maintenance color changes. This ammonia-free, demi-permanent color formula is enhanced with keratin and provides high shine and genuine, natural hair color results.