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Haircare products with natural ingredients on a wooden surface for styling.

Haircare

Skincare

Assorted bathing bars with skincare ingredients and a towel on a neutral background

Bath + Shower

Fur and Skincare Bundle for Dogs - The Cornish Seaweed Bath Co.

Pups

Naturally Brighten Blonde, Silver & Grey Hair - Without Synthetic Dyes

Plant-Powered Purple Haircare that Tones Brassiness, Enhances Shine, and Supports Scalp Health.

“Finally - a purple shampoo that tones without drying or staining my hair purple. My scalp feels so calm, and my silver looks utterly gorgeous!”

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Neutralises Brassiness

Hydrates and Softens Hair

Supports Scalp Health

No Synthetic Dyes or Harsh Chemicals

Launch Week!
Brighten & Tone Naturally — Save Up To 49% Off Sets ✨

See the natural difference from the first wash...

Blonde

Before
The Complete Super Nutrient Purple Haircare Set - The Cornish Seaweed Bath Co.

Blonde

After

Silver

Before
The Complete Super Nutrient Purple Haircare Set - The Cornish Seaweed Bath Co.

Silver

After

How our purple seaweed haircare works, naturally

Neutralises brassiness, softens strands, and restores scalp balance

The Complete Super Nutrient Purple Haircare Set - The Cornish Seaweed Bath Co.
The Complete Super Nutrient Purple Haircare Set - The Cornish Seaweed Bath Co.

Naturally Tones Brassy Hair

Plant-based pigments gently neutralise yellow tones — for brighter blonde, silver, and grey hair without synthetic dyes.

Strengthens Hair with Botanical Proteins

Blue Spirulina and Seaweed help fortify strands, reduce breakage, and boost natural shine.

Soothes and Balances the Scalp

Radish, Mint, and Frankincense calm irritation and support a clear, healthy scalp.

Feeds Hair with Essential Nutrients

Our seaweed and botanicals nurture hair and scalp with vitamins, minerals, and antioxidants.

How Our Purple Haircare Fits Into Your Routine

Super Nutrient Shampoo - The Cornish Seaweed Bath Co.
Super Nutrient Shampoo - The Cornish Seaweed Bath Co.

Super Nutrient Shampoo & Conditoner

Daily duo to hydrate, strengthen, and keep hair healthy between toning treatments.

Super Nutrient Purple Haircare Set - The Cornish Seaweed Bath Co.
Super Nutrient Purple Haircare Set - The Cornish Seaweed Bath Co.

Purple Shampoo & Conditioner

Use once or twice weekly or as needed to neutralise brassiness and enhance brightness.

Detox Shampoo

Preps hair for a smoother switch to seaweed-powered care. Also great as an occasional hair reset!

Super Nutrient Hair & Scalp Oil - The Cornish Seaweed Bath Co.

Hair & Scalp Oil

Pre-wash treatment to nourish, soothe, and rebalance dry or oily scalps.

Nutri - Therm Hair Serum - The Cornish Seaweed Bath Co.
Nutri - Therm Hair Serum - The Cornish Seaweed Bath Co.

Nutri-Therm Hair Serum

Protects from heat while restoring strength, shine, and volume.

The New Discoveries Set - The Cornish Seaweed Bath Co.

Light Hold Hair Mousse

Nourishing foam that hydrates, adds volume, and enhances natural vitality.

Your Purple Haircare Questions, Answered

How do I use your Purple Haircare?

Massage the Super Nutrient Purple Shampoo into wet hair, focusing on areas where brassiness is most noticeable.

Leave on for 1–3 minutes depending on the desired level of toning, then rinse thoroughly.

Follow with Super Nutrient Purple Conditioner, applying to mid-lengths and ends. Leave on for 2–5 minutes before rinsing.

To neutralise yellow or brassy tones, use with every wash until your desired tone is reached. Then, use weekly or as needed to maintain brightness and balance, alternating with our regular Super Nutrient Shampoo & Conditioner.

What makes your Purple Shampoo and Conditioner different?

Our purple haircare is made with 100% natural ingredients — including plant-based pigments from blue spirulina, radish extract, and Cape Jasmine fruit — rather than synthetic dyes. It gently tones brassiness in blonde, silver and grey hair without staining or drying the hair.

Will this stain my hair or shower, or leave a purple tint?

No — our natural pigments are carefully balanced to tone without leaving a purple haze or unwanted residue, even on porous or lightened hair. They rinse cleanly and gently.

Is it safe for coloured or highlighted hair?

Yes. Our formulas are free from sulphates, silicones, and harsh detergents, making them ideal for coloured hair. They help maintain vibrancy without stripping natural or dyed colour.

What ingredients give the purple colour?

The natural purple hue comes from a blend of blue spirulina (a seaweed), radish extract, and Cape Jasmine fruit — all selected for their plant-based pigment and hair-friendly properties.

Launch Week!
Brighten & Tone Naturally — Save Up To 49% Off Sets ✨

The Complete Super Nutrient Purple Haircare Set - The Cornish Seaweed Bath Co.

Did you know?

Synthetic purple dyes can stain, irritate, and dry your hair.

Artificial pigments in synthetic purple shampoos can leave behind a greyish or purple tint - especially on porous hair — and may be linked to sensitivities, allergies, and scalp irritation.

That’s why we created a better alternative.

Our Super Nutrient Purple Shampoo and Conditioner gets its violet hue from Blue Spirulina, Radish & Cape Jasmine Fruit - nutrient-rich plant pigments that tone brassiness without chemicals or residue.

Made in Cornwall 

Since 2013, we've been formulating and producing our unique skin and haircare here in far West Cornwall, centered around our main ingredient - Organic Seaweed.

Shop single purple haircare, or explore the rest of our hair & skincare range

Nothing Bad, Just Good.

Powered by Seaweed

All Natural Formulations

Made in Cornwall

The Cornish Seaweed Bath Co. 52770996387 main PRODUCTION 179829997950 page.purple-haircare-v2-om697680757118