Naturtint Permanent Hair Color 6A Dark Ash Blonde. Naturtint Permanent Hair Colour. Long lasting, naturally radiant colour and shine, now with a NEW Multi-Care Mask enriched with quinoa!. Permanent Hair Colour with 100% grey coverage from the very first application, in an easy to use, non-drip gel formula. Enriched with natural plant and seed oils and extracts to gently care for your hair and scalp, with no ammonia.