Tone-on-tone cool brown hair colour, ammonia-free, for gloss shine and gentle neutralisation
L’Oréal Pro Dia Color Demi-permanent Hair Colour 4.15 is a tone-on-tone, ammonia-free colour, designed for brown bases with a balanced result and controlled cool reflection. Shade 4.15 is positioned on a cool brown base, ideal for refining colour, reducing unwanted reflections, and maintaining a natural finish.
When applied to dry hair, the creamy texture allows for even distribution, coating each hair fibre with precision. The colour develops progressively, creating a subtle cool brown with visible gloss shine. Hair appears more uniform, with greater tonal coherence and a well-groomed look from root to tip.
The lost melanin replenishment technology acts within the hair fibre, replicating natural colour and filling chromatic irregularities. This allows for a more continuous and balanced colour, with reflections true to the shade and no artificial contrast. Suitable for revitalising lengths, evening out faded tones, or softening the appearance of white hair.
Lasting up to 6 weeks, the colour remains stable and luminous. Coverage can reach up to 70% of grey hair, ensuring a natural and integrated result. The ammonia-free formula ensures greater comfort during the service and respect for the hair fibre.
With up to 92% naturally derived ingredients, this hair colour offers professional performance with a gentler approach. Suitable for colour maintenance, neutralisation of reflections, and shine enhancement on brown hair.
Key Features
- L’Oréal Professionnel demi-permanent hair colour
- Shade 4.15, cool brown base
- Ammonia-free formula
- Up to 70% grey hair coverage
- Lasts up to 6 weeks
- Up to 3 times more shine
- Lost melanin replenishment technology
- Reflections true to natural shade
- Lightens up to 1 level and darkens up to 4 levels
- Up to 92% naturally derived ingredients
- Creamy texture for easy application
- Professional 60ml format
Frequently Asked Questions
Is L’Oréal Pro Dia Color Demi-permanent Hair Colour 4.15 a cool shade?
Yes. Shade 4.15 has a cool direction, helping to subtly balance warm reflections.
Is this shade suitable for neutralising warm tones in hair?
Yes. It can help soften warm reflections, maintaining a natural result without artificial contrast.
Does L’Oréal Pro Dia Color 4.15 cover grey hair?
Yes. It can cover up to 70% of grey hair, ensuring an integrated and natural result.
The shade samples are merely indicative, as they may vary depending on the computer screen used for viewing. Therefore, Pluricosmética disclaims any responsibility for potential colour variations that may occur.
You can use any Diactivateur developer with Dia colour (mixing ratio: 1 + 1.5). For best results, we recommend: Diactivateur 6 vol. for gentle colour deposit; Diactivateur 9 vol. for medium colour deposit; Diactivateur 15 vol. for intense colour deposit.
Wear suitable disposable gloves. Do not use metallic tools (bowl, comb...). Use only the recommended Diactivateur.
In a bowl, applicator bottle, or shaker, mix 60 ml (1 tube) of Dia Color cream and add 90 ml of the chosen Diactivateur developer. Apply to dry hair.
First application: The 20-minute development time begins at the end of the application.
Root retouch: Apply to the root area, start the 20-minute development time, then immediately distribute through the rest of the hair to revitalise the colour for a deeper and/or darker result.
Distribute through the rest of the hair after 10 min, if lengths and ends are moderately faded.
Emulsify during the last 5 min, if the colour is slightly faded.
At the end of the development time, emulsify carefully for a few minutes. Rinse hair thoroughly until the water runs clear. Wash with Metal Detox shampoo.
Latest update: 2026-06-17 11:14:10
Limited - Few Units in Stock
unavailable - no availability
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Limited
-
Available
-
Limited
-
Limited
-
Limited
-
Limited
-
Available
-
Available
-
Available
-
Limited
-
Available
-
Available
-
Limited
-
Limited