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Hair Care Updated July 11, 2025

Purple shampoo on brown hair

Purple shampoo neutralizes brassy tones in brown hair, keeping it cool and fresh. It’s like a color corrector for unwanted warmth.

Category

Hair Care

Use Case

Used to neutralize brassy tones in brown hair with warm or highlighted undertones.

Variants

Sulfate-free, for dark hair, with added conditioning

Key Features

In Simple Terms

What it is
Purple shampoo is a special hair product with a light purple color. Think of it like a gentle toner for your hair—it helps neutralize unwanted warm or brassy tones, especially in light-colored hair. While it’s often used by blondes, it can also work on brown hair, depending on the shade and your goals.

Why people use it
People with brown hair use purple shampoo to cool down reddish or orange tones that can appear over time. Sun exposure, washing, or chemical treatments (like dyeing) can make brown hair look warmer or dull. Purple shampoo acts like a color corrector—similar to how a purple-tinted makeup primer cancels out yellow tones on skin.

Basic examples
  • If your brown hair has highlights or a caramel tint, purple shampoo can keep the color fresh and prevent it from turning too orange.
  • For dark brown hair with subtle red tones, it can mute the warmth, making hair look more neutral or ashy.
  • If you’ve lightened your hair and notice brassiness, purple shampoo can help maintain a cooler, smoother color between salon visits.

  • How to use it
  • Use it once a week (or less) to avoid over-toning, which can make hair look slightly gray or dull.
  • Leave it on for 1-3 minutes, then rinse thoroughly—like a quick color refresh.
  • Follow with conditioner, as purple shampoo can be slightly drying.

  • Who it’s best for
  • Light to medium brown hair with warm undertones.
  • Brunettes with highlights or balayage.
  • Those who want low-maintenance color care without frequent salon trips.

  • What to avoid
  • Don’t use it daily—it’s strong, like a concentrated treatment.
  • Avoid if your hair is already very cool or ashy—it might add unwanted purple tones.
  • Patch-test first if your hair is sensitive to products.
  • Technical Details

    What It Is


    Purple shampoo is a specialized haircare product designed to neutralize unwanted warm or brassy tones in hair, particularly for blonde, gray, or lightened hair. However, it can also be used on brown hair with highlights or balayage to achieve a cooler, ashier tone. It falls under the category of toning shampoos, which leverage color theory to correct hair discoloration.

    How It Works


    Purple shampoo works through color correction principles, specifically the concept of complementary colors. Purple sits opposite yellow on the color wheel, meaning it cancels out yellow and orange tones in hair. The shampoo deposits microscopic purple pigments onto the hair shaft during washing, counteracting brassiness.

    The technology relies on semi-permanent dyes or pigments suspended in a gentle cleansing base. These pigments adhere to the hair cuticle without penetrating deeply, making the effect temporary and requiring regular use for maintenance.

    Key Components


  • Purple Pigments: Typically derived from synthetic dyes like CI 60730 (Ext. Violet 2) or natural alternatives.
  • Cleansing Agents: Sulfate-free surfactants (e.g., cocamidopropyl betaine) to avoid stripping hair color.
  • Conditioning Agents: Ingredients like panthenol or glycerin to maintain moisture balance.
  • pH Balancers: Ensures the shampoo is hair-friendly (pH 4.5–5.5) to prevent damage.

  • Common Use Cases


  • Brown Hair with Highlights: Neutralizes brassiness in lightened sections for a cooler, blended look.
  • Balayage or Ombre: Maintains ashy tones in gradient-colored brown hair.
  • Post-Color Treatment: Extends the life of salon-toned brown hair by delaying warmth.
  • Gray Coverage: Softens yellow tones in naturally graying brown hair for a more polished appearance.