L’Oréal Pro Dia Light Gloss Color Hyaluronic Acid Hair Colour 9.03

Color Gloss with Hyaluronic Acid: The Professional Hair Colour that Hydrates As It Transforms

Now revamped – with a new look, the same professional performance you're familiar with… and an even greater focus on shine, hydration, and precision results.

In the basin, the mixture transforms into a smooth, easy-to-control cream. During application, you'll feel the difference: it glides on without dripping, envelops the hair fibre, and 'hugs' the hair – even when sensitised after bleaching. In 20 minutes, the results emerge… mirror-like shine, cleaner reflexes, and naturally revived colour.

Dia Light is an acidic pH tone-on-tone hair colour, formulated for technical salon services: toning after bleaching, neutralising unwanted tones, refreshing faded lengths, and restoring that gloss effect that transforms dull hair into hair with presence. Ammonia-free, no lightening, no added damage… and with a feeling of a more replumped fibre.

Hyaluronic Acid (hyaluronic complex) works during the service: it helps restore lost moisture and coats the fibre with a hydrating layer. The cuticle becomes more sealed, the hair feels more disciplined, and gains resilience – ideal when the priority is to preserve the integrity of the cortex and work safely on bleached hair.

For your salon, it means predictability and personalisation: 80 shades + chromatic boosters (Blue, Violet, Red/Orange, Yellow/Orange, Green) to build colour, shine, and neutralisation in detail, with a glossy finish that can last up to 6 weeks.

Key Features:

Acidic tone-on-tone hair colour (acidic pH)

Enriched with Hyaluronic Acid: hydration during colouring

Ammonia-free and no lightening

Immediate gloss effect: 82% more mirror-like shine and a softer feel

Tones and neutralises unwanted tones post-bleaching

Revives faded lengths and ends after colouring

Instantly combats visible fibre dehydration

2x more hydration vs. previous formula

Preserves the integrity of the hair cortex and helps seal the cuticle

Helps strengthen sensitised fibre (instrumental test on bleached hair)

Results with shine/gloss colour for up to 6 weeks

Processing time: 20 minutes

For professional use

The shade samples are for indication purposes only, as they may vary depending on the computer screen used for viewing. Pluricosmética therefore declines any responsibility for any colour variations that may occur.