Garnier Olia Permanent Hair Dye No Ammonia Long Lasting 5.0 Brown Garnier Olia Permanent Hair Dye No Ammonia Long Lasting 5.0 Brown Garnier believe oil can do more than condition hair. In Garnier Olia Permanent Brown Hair Dye, 60% oil-powered technology with natural flower oils works at the heart of the colour system to help maximise colour performance. The result: rich, vivid, long-lasting brown colour with no ammonia and a pleasant scent. The oil-infused formula helps visibly improve hair quality, leaving hair with better shine and up to 35% smoother hair** after colouring. The non-drip, velvety cream texture ensures a comfortable application and optimal scalp feel. **Instrumental test vs. before and after colouration. How to Choose Your Brown Shade Understanding hair colour numbers helps you find your perfect match: The first number indicates lightness to darkness (e.g., 4 = Dark Brown, 6 = Light Brown). The second number reveals the tone/reflect: .0 Natural .3 / .4 / .5 / .6 Warm tones (gold, copper, mahogany) .1 / .2 Cool tones (ash, pearl) Examples: 4.0 = Natural Dark Brown 4.3 = Golden Dark Brown 4.15 = Ash Dark Brown Always check the back of the pack to confirm shade suitability for your current hair colour.