Garnier Olia Permanent Hair Color 4.0 2-Pack
- 100% gray coverage for up to 6 weeks
- 60% oil blend, sunflower and camellia oils
- 30 minutes processing
- Ammonia free, no parabens, silicones or phthalates
- 2 kits, each with developer, colorant, conditioner, gloves
- 3x shinier hair claim vs unwashed, uncolored hair
- Vegan, cruelty free
Last refreshed Sep 7, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
An ammonia-free permanent dark brown dye for home colorers who want full gray coverage, shine and little odor. Long hair may need several boxes, so check the brand guidance against your length first.
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ASIN: B07BVVPMVXCategory: Hair Color
Overview
Mixing the colorant into the developer bottle and applying it to dry, unwashed hair starts a home color that covers grays in one sitting. The oil-powered blend pushes color into the hair fiber without ammonia, and an after-color conditioner finishes the job.
Full gray coverage without ammonia is the case for it, with an oil blend that also leaves hair shinier. Coverage fades after several weeks, and long hair can need more than one box.
Who it's for
Dark-haired people covering grays at home, on any hair texture, get a complete two-kit supply with an oil-based formula. Anyone with long hair should note the brand suggests two to three boxes for that length.
Pros and cons
- Full gray coverage
- Ammonia free, low odor
- Oil blend adds shine
- Complete kit with gloves
- Gray coverage lasts up to 6 weeks
- Long hair may need more boxes
- Patch test guidance not listed
Performance notes
The oil blend carries colorant deep into the hair fiber, which is how it reaches full gray coverage without ammonia. Applying to dry, unwashed hair and timing the processing accurately decide how even the result is. Rinsing until the water runs clear, then conditioning, seals in color and shine.
Specifications
| Brand | Garnier |
|---|---|
| Dimensions & fit | |
| Item weight | 15.31 ounces |
| Construction & materials | |
| Color | 4.0 Dark Brown |
| Hair Color Permanence | Permanent |
| Suitable Hair Color | Dark Brown |
| Material Type Free | Ammonia, paraben, phthalate, silicone free |
| Material Features | Natural |
| Included components | |
| Included Components | Developer applicator, colorant tube, after-color conditioner, gloves, instructions (per kit) |
| Other details | |
| Full Cure Time | 30 minutes |
| Hair Type | All |
| Number Of Items | 2 |
| Gray coverage | 100%, up to 6 weeks |
| Key ingredients | 60% oil blend, sunflower and camellia oils |
| Container Type | Box |
| Item Form | Cream |
| Product Benefits | Hair Coloring |
| Recommended Uses For Product | Oxidization Hair Color |
| Set Name | Complete Hair Dye Kit |
Frequently asked questions
Does Garnier Olia work on textured hair?
Yes. The listing says it is made for all hair types and textures.
How many boxes of Garnier Olia do I need for long hair?
Garnier suggests one to two boxes for short to medium hair and two to three for long hair.
Does Garnier Olia smell like ammonia?
It is ammonia free, and the listing says it colors without strong odor.
Should Garnier Olia go on freshly washed hair?
No. Apply it evenly to dry, unwashed hair.