What Does Purple Shampoo Do? A Hairdresser Explains

Purple shampoo is one of those products that sounds like a gimmick until you try it. We get asked about it constantly in the salon — by clients with freshly bleached hair, by people whose balayage has gone a bit warm, and by anyone with grey or silver hair that's picked up a yellow tinge. So here's a proper explanation of what it actually does, from people who use it every week.

What does purple shampoo do?

Purple shampoo deposits small amounts of violet pigment onto your hair to neutralise yellow and brassy tones. That's it. It doesn't bleach, it doesn't lighten, and it doesn't permanently change your colour. It just counteracts warmth.

The reason it works comes down to basic colour theory. On the colour wheel, purple sits directly opposite yellow. Opposite colours cancel each other out — so purple neutralises yellow the same way a green toner cancels out red, or a blue shampoo cancels out orange. The pigments in the shampoo coat the outside of the hair shaft and correct the tone while you wash.

Who should use purple shampoo?

Anyone with blonde, platinum, silver, grey, or white hair — whether natural or colour-treated. It's also useful for anyone with highlighted hair, balayage, or bleached hair who wants to keep the colour looking cool and fresh between salon visits.

It won't do much for dark hair that hasn't been lightened, because there's no exposed yellow pigment for it to neutralise. But if you've got highlights running through darker hair, purple shampoo will work on those lightened sections.

How long should you leave purple shampoo on?

This is where most people go wrong. The timing really matters and it varies depending on your hair:

• Warm blonde highlights: 1 to 2 minutes. You're just taking the edge off the warmth, not going cool.
• Neutral blonde: 3 to 4 minutes. Enough to keep things balanced without going ashy.
• Cool or platinum blonde: 4 to 5 minutes. This is where the toning really kicks in.
• Silver or grey hair: 3 to 5 minutes. Yellow in silver hair can be stubborn — don't be afraid to let it sit.
• Freshly bleached hair: Start with 2 minutes and build up. Bleached hair is porous and grabs pigment fast — especially on the ends.

The longer you leave it, the more toning you'll get. But leave it too long on porous or damaged hair and you'll end up with a purple or lavender tinge, which is exactly what you were trying to avoid. If that happens, a clarifying shampoo will sort it.

Purple shampoo on bleached hair — what you need to know

Bleached hair is a different situation to highlighted hair. When hair is fully bleached, the cuticle is more open and the hair is more porous — which means it absorbs everything faster and more unevenly. The ends of bleached hair in particular are often more damaged and more porous than the roots, which means they'll grab the purple pigment more aggressively.

This is why people end up with purple ends and barely-toned roots. To avoid it, apply the shampoo to the roots first and work down to the ends last. Leave it for less time than you think you need, especially for the first few uses.

It's also worth knowing that purple shampoo can be drying on bleached hair — the sulphates in most shampoos strip moisture, and bleached hair doesn't have much to spare. Always follow with a good conditioner, and consider a weekly hair mask.

How often should you use purple shampoo?

Once or twice a week as a general guide. Using it every wash is too much — you'll end up with over-toned, dull-looking hair that's lost its brightness. Alternate with your regular shampoo and treat purple shampoo as a maintenance tool rather than an everyday product.

If your hair is very brassy, you can use it more frequently for the first couple of weeks and then drop back to once a week once you've got the tone where you want it.

Purple shampoo vs blue shampoo — what's the difference?

They both work on the same colour-cancelling principle, but they target different tones:

• Purple shampoo neutralises yellow and gold tones. Best for blonde, silver, grey and platinum hair.
• Blue shampoo neutralises orange and red tones. Better for brunettes with warm highlights, or anyone whose hair goes orange when it fades.

If you've got balayage or highlights on darker hair and they're going orange rather than yellow, blue shampoo is more likely to be the right choice. If they're going yellow and brassy, purple is your friend.

Which purple shampoo should you use?

We stock a range of professional purple shampoos in the shop — the same quality you'd find in a salon, not the supermarket versions that tend to be weaker and less consistent.

A few worth knowing about:

• Fanola No Yellow Shampoo — one of the most pigmented purple shampoos available. It works fast and works hard. Not one to leave on for too long on the first use. Great for stubborn brassiness.
• Maria Nila True Soft — a gentler option that's fully vegan and works well for more sensitive or finer hair that doesn't need aggressive toning.
• Amika Bust Your Brass — a good all-rounder. Sulphate-free, colour-safe, and leaves hair in good condition.

Browse our full range of purple and toning shampoos here.

Does purple shampoo damage hair?

No — but it can dry it out if you use it too often or leave it on too long, particularly on already-bleached hair. The pigments themselves don't damage hair. The sulphates in some purple shampoos can strip moisture if overused, which is why sulphate-free options are worth considering for bleached or heavily processed hair.

Always condition after using purple shampoo, and if your hair feels dry, a weekly treatment mask will help keep things in balance.

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Frequently asked questions

Can I use purple shampoo on brown hair?

It won't do much on dark brown hair that hasn't been lightened, as there's no exposed yellow pigment to neutralise. If you have highlights or balayage in brown hair, purple shampoo will work on those lightened sections.

Will purple shampoo turn my hair purple?

Only if you leave it on for too long — particularly on porous, bleached hair. Start with a shorter time and build up. If you do end up with a purple tinge, wash with a clarifying shampoo and it will fade.

Can I use purple shampoo on grey hair?

Yes — this is one of its best uses. Grey and silver hair often picks up yellow tones from pollution, hard water and product build-up. Purple shampoo neutralises those tones and keeps silver hair looking bright and clean.

How do I stop purple shampoo turning my ends purple?

Apply to roots first, work down to the ends last, and reduce the time you leave it on. Bleached ends are more porous and grab the pigment faster than roots — managing the application order makes a big difference.

Is purple shampoo the same as toner?

They work on the same principle but aren't the same. A salon toner is a professional colour treatment applied by a hairdresser that lasts several weeks. Purple shampoo is a maintenance product you use at home between appointments — it's gentler and temporary.

Should I use purple shampoo before or after conditioning?

Before. Shampoo first (and let it sit for a few minutes), then rinse and condition as normal. Some people also use a purple conditioner on top for extra toning.