Is Olia less effective than a hair color with ammonia?

No, even though Olia does not contain ammonia it's just as effective as a classic hair color with ammonia

How effective is Olia on grey hair?

Olia is a permanent hair color and delivers on up to 100% grey coverage for up to 6 weeks.

Many brands have oils nowadays… How is Olia different?

When a hair color contains oil, it is usually in the conditioner. In Olia, the oil is concentrated in the colorant itself to boost the coloring process by propelling color deep into the hair fiber.

What if only my roots need coloring?

You may need to vary the development time throughout your hair. Follow the instruction leaflet for timing and application techniques. Use our step by tep tool or watch the how-to video.

How much product should I use to get full hair coloration?

Like all hair coloring, it depends on your hair length and thickness. For medium to long hair use 2 boxes. For long hair or hair that is very thick, you may need to use more than 2 boxes.

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Hair Color Olia Ammonia-Free Brilliant Color Oil-Rich Permanent Hair Dye, 4.15 Dark Soft Mahogany, 1 Count (Packaging May Vary)

Hair Color Olia Ammonia-Free Brilliant Color Oil-Rich Permanent Hair Dye, 4.15 Dark Soft Mahogany, 1 Count (Packaging May Vary)

Product ID: 276958598

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Details

Colour
4.15 Dark Soft
Package information
Box
Product benefits
Deep Hydration
Brand
Garnier
Item form
Oil

🌿Ammonia-free & vegan formula

🎨100% gray coverage with rich mahogany

🛢️60% oil blend for vibrant shine

Description

🎨 Turn heads with mahogany magic—shine brighter, live bolder!

TRIPLE SHINE BOOST - Enjoy hair that’s up to 3x shinier, silky, and hydrated—because your color should look as healthy as it feels.
ETHICAL BEAUTY CHOICE - Leaping Bunny certified, cruelty-free, paraben-free, silicone-free, and vegan—color with a conscience.
OIL POWERED BRILLIANCE - Experience radiant, long-lasting color with a unique 60% natural flower oil blend that nourishes as it colors.
AMMONIA FREE CONFIDENCE - Gentle on hair and scalp, this ammonia-free formula delivers vivid results without harsh chemicals—perfect for sensitive users.
VIVID MAHOGANY PERFECTION - Achieve cool, reddish tones on dark brown hair for a standout mahogany shade that turns heads.

Garnier Olia Dark Soft Mahogany 4.15 is a permanent, ammonia-free hair dye enriched with a 60% natural flower oil blend that delivers 100% gray coverage and up to 3x shinier, healthier hair. Designed for natural hair from light brown to black, this cruelty-free, vegan formula offers vivid, long-lasting color with nourishing care.

Specifications

Manufacturer	Garnier
Item model number	U-HC-9030
Product Dimensions	6.99 x 8.89 x 16.5 cm; 222 g
ASIN	B00BOEEX04

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