Oligo Professionnel Blacklight Blue Shampoo for Blonde & Highlighted Hair — Sulfate-Free, Argan Oil + 11 Amino Acids — 8.5 oz

Blacklight Blue Shampoo by Oligo Professionnel is a sulfate-, salt- and paraben-free blue toning shampoo formulated to neutralize brassy tones and refresh highlights for light brown to medium blonde hair.

Formulated with argan oil and a blend of 11 amino acids, this vegan blue shampoo gently cleanses while depositing blue pigments to counteract warm, unwanted brassiness. Designed for hair levels 5 to 7 (light brown through medium blonde), it restores cooler, cleaner-looking color between salon visits and helps maintain the brightness of bleached, highlighted, white, or natural blonde hair.

How quickly will I see a difference in brassiness?

Most users notice a visible reduction in warm tones after the first application, especially when left on for the recommended time. Results depend on initial hair color and porosity; higher porosity may absorb pigment more intensely.

• Apply to damp hair, lather, and rinse; repeat and leave for 2–5 minutes on the second application.
• Use weekly or whenever warm tones reappear.
• Pair with Blacklight Blue Conditioner to refine tone and add moisture.

Is this safe for color-treated or fragile hair?

The formula avoids harsh sulfates, salts, and parabens, and includes nourishing argan oil and amino acids that support treated hair without stripping color. It acts as a toning cleansing step rather than an aggressive clarifier.

• Sulfate-free base helps preserve color-driven pigments.
• Argan oil and amino acids add hydration and strength to processed strands.
• Recommended frequency prevents over-toning or dryness when used as directed.

How do I use Blacklight Blue Shampoo for best results?

Integrate it into your routine as a corrective shampoo: wet hair, work the product into a lather, rinse, then repeat and allow the second application to sit 2–5 minutes. Wearing gloves prevents blue staining on hands and nails.

• Apply on damp hair and rinse thoroughly after first wash.
• Second application: leave 2–5 minutes depending on desired toning intensity.
• Follow with Blacklight Blue Conditioner to lock in moisture and refine tone.

What hair shades benefit most from this product?

This blue-toning shampoo is optimized for hair from light brown to medium blonde (levels 5–7), as these tones are most prone to warm, brassy shifts. It also works to refresh highlights and revive faded blonde shades without heavy processing.

• Ideal for bleached and highlighted blonde, white, or natural blonde hair.
• Helps maintain salon toning between appointments.
• Can be used on darker hair with highlights to counteract localized brassiness.

Who is this for: Blacklight Blue Shampoo suits anyone with light brown to medium blonde hair seeking a gentle, salon-grade toning wash that reduces brass and refreshes highlights. It’s a good choice for people with color-treated or processed hair who want to preserve cooler tones, add moisture with argan oil, and avoid sulfates and parabens. Stylists and at-home users alike will appreciate the concentrated 8.5oz bottle for regular maintenance of brighter, cleaner-looking blonde color.