Oil-powered hair colour for a natural dark brown hair colour. The 1st permanent home hair colour powered by oil, not ammonia, to reduce damage while providing a rich and vibrant dark brown hair colour. Olia's Oil Delivery System Technology uses oils to propel the dark brown hair dye pigments deep into the hair fibre to give you maximum colour performance and visibly improve hair quality. After using the Olia 4.0 Dark Brown Hair Dye with no ammonia in , the hair is 35% smoother with 3x more shine*. *Instrumental tests, vs before colouration.

BENEFITS OF OLIA 4.0 DARK BROWN HAIR COLOUR
• No Ammonia
• No Silicone
• Vegan Formula*

THE POWER OF 60% OILS FOR EXCEPTIONAL BRUNETTES
Hight-impact dyes go deep into the hair thanks to Olia's Oil-Delivery System. The power of 60% oil and no ammonia colours the hair and improves its quality after application. The multi-use conditioner is especially designed to nourish colour-treated hair and help keep it looking flawless.

AN ULTRA SENSORIAL EXPERIENCE
Olia offers optimal scalp comfort, easy application with a smooth, velvety, non-drip texture and no ammonia for a pleasant scent.

CARES FOR YOUR HAIR
Garnier Olia visibly improves your hair quality making your hair 3x shinier**. Hair is nourished and protected against dryness.

IS THIS THE RIGHT SHADE FOR ME?
Shade 4.0 is best for anyone with natural hair between light brown and black. If you prefer a lighter colour that still reflects naturally, try shade 5.0 Medium Brown. If you would like to remain in the dark brown range but want to explore other reflects and tones, try 4.15 Iced Chocolate. For those who currently have colour treated hair, there are special considerations for the colour result you can achieve. Use our Hair Colour Shade Selector Tool to find the shade for you!

RESULTS
- Maximum Colour Performance
- Intense, multi-tonal colour
- Up to 100% Grey Coverage
- Long Lasting and Shiny Colour
- Optimal Scalp Comfort
- Visibly Improved Hair Quality

NOW WITH 43% LESS PLASTIC*** and an easier preparation  Learn more about Garnier's Sustainability Commitments.

WHAT'S IN YOUR KIT OF YOUR OLIA 4.0 DARK BROWN HAIR COLOUR?
1. The applicator bottle of developer hair dye cream
2. The colourant tube, with a velvety texture and subtle floral fragrance
3. The Silicone free after colour care
4. The pair of gloves
5. The instruction leaflet

*No animal derived ingredients
**Instrumental test
***Compared to the previous kit

Find your perfect hair colour shade online with Virtual Try On. 

How To Use Olia 4.0 Dark Brown Permanent Hair Dye

1) Put on your gloves and keep them on for the preparation and the whole hair dye application. 2) Apply the product that you have previously prepared to dry unwashed hair, massage the product through your hair and flatten it on your roots and leave it for 30 minutes. 3) Rinse and condition your hair applying a hazelnut- sized amount of silk & shine multi-application conditioner and leave it for 3 minutes. Thoroughly rinse your hair.

Learn more on how to dye your hair with our Hair Colour Tips and Tricks

Is Garnier Olia Permanent Hair Colour - 4.0 Dark Brown cruelty free?

Yes - all Garnier products are officially approved by Cruelty Free International. Since 1989, Garnier has been committed to a world without animal testing. Rest assured when you use this dark brown hair dye without ammonia that your cosmetic usage is ethically developed.

Read more on Garnier's commitment to cruelty free beauty here.