Quick Answer

Purple shampoo is your go-to for neutralizing yellow or brassy tones on light blonde, platinum, or silver hair. Blue shampoo is better for canceling orange tones on darker or warmer blondes, such as strawberry blonde or light brown with highlights. Choose based on the unwanted tone you see, not just your base color.

If you've ever stared at a shelf of toning shampoos and wondered whether purple or blue is the right pick, you're not alone. Both promise to banish brass, but they work on different color wheels. The key is matching the toner to the specific unwanted tone in your hair.

Here's the simple rule: purple cancels yellow, blue cancels orange. Your blonde shade and the level of brassiness determine which one you need. We'll break down how to tell the difference, how to use each, and what to look for in a toner.

How Purple Shampoo Works

Purple shampoo deposits violet pigments onto the hair shaft. Since purple sits opposite yellow on the color wheel, it neutralizes the yellow and brassy tones that often appear in light blonde, platinum, and silver hair. It's the classic choice for maintaining an icy or cool-toned blonde.

For best results, use purple shampoo once or twice a week, depending on your hair's porosity and how quickly brass develops. Leave it on for 2–5 minutes, but check the color frequently to avoid over-toning, which can leave a lavender or gray cast on very light hair.

  • Use purple shampoo if your blonde is light enough to show yellow tones, not orange.

How Blue Shampoo Works

Blue shampoo uses blue pigments to cancel orange tones. Orange appears in darker blondes, such as strawberry blonde, dirty blonde, or hair that's been lifted a few levels but still has warmth. If your hair looks orange or copper, blue is the more effective choice.

Blue shampoo can also be used on brunettes with highlights or balayage to tone down orange streaks. It's less likely to over-lighten or deposit a visible tint on darker hair, making it a safe option for maintaining a natural, warm blonde without going icy.

  • Choose blue shampoo when your hair has orange or copper tones rather than yellow.

How to Choose Between Purple and Blue

Start by examining your hair in natural light. If you see yellow (like a banana or lemon), go purple. If you see orange (like a carrot or copper penny), go blue. If you see both, you may need to alternate or choose a product that combines both pigments.

Consider your target shade. If you want a cool, ashy, or platinum blonde, purple is your best bet. If you prefer a warmer, golden blonde without the orange, blue will help you achieve that more natural tone.

  • Take a photo in daylight to accurately assess the undertone of your hair.

Toning Tips for Best Results

Regardless of which toner you choose, application matters. Use a generous amount, focus on the mid-lengths and ends where brass shows most, and avoid the scalp unless you have yellow or orange roots. Wear gloves to prevent stained hands.

Don't leave the shampoo on too long. Start with 2 minutes and increase gradually. If you have porous or damaged hair, it will absorb pigment faster, so check earlier. Over-toning can leave your hair looking dull or tinted.

  • Always follow with a conditioner to keep hair hydrated and smooth.

Purple vs. Blue: The Tradeoffs

  • Purple Shampoo: Best for light blonde, platinum, and silver hair to cancel yellow tones. Can leave a lavender or gray cast if overused on very light hair. Use sparingly and monitor processing time.
  • Blue Shampoo: Ideal for darker blondes with orange or copper tones. Less risk of over-toning on medium shades, but may not be strong enough for very light hair. Great for natural-looking, warm blondes.
  • Combination Formulas: Some products blend purple and blue pigments for hair that has both yellow and orange tones. These can be convenient but may not be as targeted. Consider if you have multi-tonal brass.

Product Facts to Keep in Mind

  • Lagoona - Dry Shampoo: This dry shampoo revitalizes and refreshes hair with no washing necessary. Formulated with a fast-absorbing powder blend of shea butter coated rice starch, bamboo and lotus that absorb excess oil, sweat and impurities while adding volume and bounce. Developed for all hair types and colors. Safe for color-treated locks. Between toning sessions, a dry shampoo helps absorb oil without stripping color, so your toner lasts longer and your blonde stays fresh.
  • Santal Bloom - Hair Gloss: Our fast-acting rinse transforms dull hair in the shower: The amino-acid-rich formula smooths frizz, strengthens strands, and conditions for silkier, glossier, healthier-looking hair. A gloss can enhance shine and tone without the pigment of a shampoo, making it a good complement to your toning routine for extra luster.

Which Toner Fits Your Hair?

Best For

  • Light blonde, platinum, or silver hair with yellow tones
  • Anyone aiming for an icy, cool, or ashy blonde look

Not For

  • Darker blondes with orange or copper tones (choose blue)
  • Anyone with very porous or damaged hair who may over-absorb pigment

Choosing between purple and blue shampoo comes down to the tone you want to cancel. Assess your hair in natural light, pick the matching toner, and use it with care to keep your blonde looking fresh and vibrant. Remember to follow up with conditioners and treatments to maintain hair health.