L'Oreal Paris Cool Supreme Permanent Hair Color — Ultra Ash Light Brown (6UA), 100% Gray Coverage & Anti-Brass

L'Oreal Paris Cool Supreme Permanent Hair Color 6UA (Ultra Ash Light Brown) is a permanent at-home shade formulated to deliver ashy, cool-toned color with 100% gray coverage while minimizing brassiness.

Designed for people who want a salon-inspired cool brown with neutralized warm undertones, this kit from L'Oreal Paris combines a non-drip crème formula, an anti-brass protection system, and a purple conditioner to help the shade stay ashy and even after application. The formula covers stubborn grays and aims to preserve the cool tone for weeks, giving a balanced brown that reads slightly smoky and neutral rather than warm or orange.

How does this shade keep hair from turning brassy?

The Cool Supreme line uses a triple anti-brass protection approach: pigment technology to counter warm undertones, a protective development system during coloring, and a purple conditioner to neutralize residual warmth. Together these steps reduce the common post-dye shift toward orange or gold.

• Pigment blend designed for cool, ashy reflectance
• Protective color system during the chemical process
• Purple Anti-Brass conditioner to tone down warm highlights after rinsing
• Visible cool effect maintained for multiple weeks with proper care

Will it cover my gray hair effectively?

This permanent formula is formulated to provide full gray coverage, including resistant or stubborn gray strands. L'Oreal Paris markets this product for total coverage from root to tip, so you should expect an even result when instructions are followed correctly.

• Permanent dye system aimed at 100% gray concealment
• Non-drip crème helps ensure consistent saturation on roots and lengths
• Follow the included timing and developer steps for best coverage
• Perform strand test if you have heavy, coarser gray growth

How long will the cool ash tone last and how should I maintain it?

The kit’s anti-brass regimen is intended to preserve the cool tone for several weeks, though exact duration depends on hair porosity, wash frequency, and styling. Use sulfate-free or color-safe shampoos, cool or lukewarm water, and the included purple conditioner to extend the ashy appearance.

• Color-retention varies by hair type and care routine
• Use purple or toning products periodically to refresh ashiness
• Limit sun and heat exposure to reduce fading
• Wash less frequently and use cool water to lock in tone

Is this safe and easy to use at home?

The kit is formulated as an at-home permanent hair color with step-by-step instructions, a non-drip crème for controlled application, and a post-color conditioner to complete the routine. Standard allergy safety steps apply—always do a patch test per the included leaflet before full application.

• Comes with developer, colorant crème, and purple conditioner
• Non-drip texture simplifies application and helps even coverage
• Clear instructions included; follow timing precisely for best results
• Patch test required to check for sensitivities

Who is this for? L'Oreal Paris Cool Supreme 6UA Ultra Ash Light Brown is best suited for anyone seeking a neutral-to-cool brown with reliable gray coverage and reduced brassiness. It’s a good match for natural brunettes or lightened hair moving toward a cooler palette, and for people comfortable performing permanent color at home who want salon-inspired, ashy results without regular salon visits.

Ingredients

Formule 1224307 AQUA / WATER / EAU CETEARYL ALCOHOL PROPYLENE GLYCOL DECETH-3 LAURETH-12 AMMONIUM HYDROXIDE OLETH-30 HEXADIMETHRINE CHLORIDE LAURIC ACID GLYCOL DISTEARATE POLYQUATERNIUM-22 ETHANOLAMINE SILICA DIMETHYL SILYLATE PARFUM / FRAGRANCE SODIUM METABISULFITE TOLUENE-2,5-DIAMINE CARBOMER RESORCINOL ASCORBIC ACID EDTA CI 77891 / TITANIUM DIOXIDE m-AMINOPHENOL THREONINE PROLINE 2,4-DIAMINOPHENOXYETHANOL HCL THIOGLYCERIN DIMETHICONE FIL CODE D227589/2 Formula 1152439 INGREDIENTS AQUA / WATER / EAU HYDROGEN PEROXIDE CETEARYL ALCOHOL TRIDECETH-2 CARBOXAMIDE MEA CETEARETH-25 GLYCERIN PHOSPHORIC ACID TETRASODIUM ETIDRONATE TETRASODIUM PYROPHOSPHATE SODIUM SALICYLATE FIL CODE D209745/14 Formula 1241648 INGREDIENTS AQUA / WATER / EAU CETEARYL ALCOHOL BEHENTRIMONIUM CHLORIDE AMODIMETHICONE ISOPROPYL ALCOHOL PHENOXYETHANOL CI 60730 / ACID VIOLET 43 BENZOIC ACID TRIDECETH-6 POTASSIUM HYDROXIDE LINALOOL HEXYL CINNAMAL CETRIMONIUM CHLORIDE ISOEUGENOL BENZYL ALCOHOL PARFUM / FRAGRANCE FIL CODE C247695/1 Formula 1241644 B INGREDIENTS AQUA / WATER / EAU SODIUM LAURETH SULFATE COCAMIDOPROPYL BETAINE DIMETHICONE SODIUM CHLORIDE PARFUM / FRAGRANCE HEXYLENE GLYCOL CITRIC ACID SODIUM BENZOATE SODIUM HYDROXIDE AMODIMETHICONE CARBOMER GUAR HYDROXYPROPYLTRIMONIUM CHLORIDE TRIDECETH-10 GLYCERIN SALICYLIC ACID GLYCOL DISTEARATE MICA LINALOOL HEXYL CINNAMAL PEG-100 STEARATE STEARETH-6 PHENOXYETHANOL ISOEUGENOL COCO-BETAINE TRIDECETH-3 CI 77891 / TITANIUM DIOXIDE BENZYL ALCOHOL ACETIC ACID FUMARIC ACID CI 60730 / EXT. VIOLET 2 FIL CODE C248858/1