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.