Indigo-Free Collection
Herbal Color,
Without the Wait
Indigo is the herb behind almost everything people find difficult about plant color: the green cast at the rinse, the three-day development, the purple result if the hair dries too soon. Take it out and all three go with it.
It is also the ingredient most likely to cause a reaction. Plant-dye allergy is rare, but where it exists, indigo is usually the culprit rather than henna. Six of our twenty-four shades contain none.
What you give up. Indigo is the only blue we have, and blue is what makes a cool tone possible. Without it there are no ash shades and no true browns — these six run from blonde through red, and warmth is the register they work in.
Six shades Tap one to see it on hair
Independently Certified
Tap any certification to see what it actually checks
What Changes Without It
Three of plant color’s four difficulties belong to indigo.
Henna bonds to keratin within the hour and is finished when you rinse. Indigo is the one that keeps going — and that is where most of the surprises come from.
Four things that simply stop happening
None of these are formulation tricks. They are consequences of one plant not being in the pouch.
- No green stage. The blue-green cast at the first rinse is unoxidised indigo. What you see is close to the finish.
- No three-day wait. Indigo is what keeps developing after you rinse. Without it, the color is essentially done.
- It can’t stall at purple. A purple result is indigo interrupted, usually by drying too fast. There is no slow reaction to interrupt.
- The vinegar trick works. Mild acid helps henna and hinders indigo — with none present, it only helps.
Five of these six are built on henna, whose pigment bonds covalently to keratin. That is also the longest-lasting bond in plant color.
No cool tones, and no browns
Indigo is the only blue in the range. Everything it makes possible goes with it.
- No ash shades. Cool tones need blue over the warmth. There is no other way to reach them with plants.
- No true browns or blacks. Every dark herbal shade is henna’s red with indigo laid over the top.
- Warmth is the register. These six run blonde through red. That is the whole available range without blue.
- Depth has to come from elsewhere. Wine Red reaches its depth with manjistha, a second red pigment, rather than with blue.
If you want an ash tone or a brown, this is the wrong collection — and we would rather point you to the right one than sell you the wrong shade.
Natural vs. Certified Organic
Same word on the shelf. Very different rules behind it.
Both labels sound like the same promise. Only one of them has to be proven to someone other than the brand making the claim.
“Natural” on a hair color box
There is no legal definition of “natural” in cosmetics in the US or the EU, so the claim is left to the brand.
- No minimum plant content. A product can be mostly synthetic and still use the word.
- Synthetic dyes may still be inside. PPD and its relatives, such as PTD, are found in products marketed as natural or herbal.
- Ammonia and peroxide are not ruled out. Nothing about the word excludes them.
- Nobody has to check. No audit, no inspection, no farm-level traceability.
This isn’t an accusation against any particular brand—it’s simply what the word does and doesn’t guarantee. Which is why the ingredient list matters more than the front of the box.
COSMOS ORGANIC, audited by ECOCERT
The strictest organic standard written specifically for cosmetics—and the one Radico has held since 2012.
- Certified organic plants, start to finish. The farms, the supply chain and the finished pouch are all inside the standard.
- No PPD, no PTD, no synthetic dye of any kind.
- No ammonia, no peroxide, no resorcinol, no synthetic preservatives or fragrance.
- Verified by outside auditors, not by our own marketing team.
In 2012 Radico became the world’s first hair color brand to earn COSMOS ORGANIC, and we have held it through every annual audit since.
How It Works
Without blue, henna does the work.
Take indigo out and the palette narrows to what a warm pigment can do on its own — which turns out to be a good deal more than orange.
Henna Leaf
Lawsonia inermis
In five of these six, and second on the list in every one of them — under a colorless base that carries no pigment of its own. That is why it is still the color foundation here despite never coming first.
Manjistha Root
Rubia cordifolia
A second red pigment, in two of these six. Wine Red leads with it — which is how a shade that deep exists without a drop of blue.
Hibiscus Flower
Hibiscus rosa-sinensis
Its anthocyanins read magenta — a red with blue in it, which is the closest this collection gets to a cool note. In three of these six. How much of it transfers to hair after rinsing has not been published.
Turmeric Root
Curcuma longa
In Sun Blonde alone, which contains no henna either — the only shade in the range built on neither. Curcumin is already colored going on, and it fades faster in sunlight than anything else we make.
Every pigment here is warm except one register of hibiscus. That is the trade in a sentence: nothing to wait for, nothing to turn green, and no way to reach an ash tone. Wine Red is the deepest shade in the range that contains no indigo at all, and it gets there with a second red rather than with blue.
Colorless Henna
Cassia auriculata
Not henna at all, despite the name — a legume, carrying almost no pigment. It takes up space in the pouch so the henna below it works on a smaller share, which is how four of these six reach blonde. In five of the six; Wine Red is the one without it.
Amla Fruit
Phyllanthus emblica
Naturally acidic, and in all six. With no indigo present, that acidity only helps — mild acid assists henna and hinders indigo, so this is the one collection where the two never work against each other.
Reetha Fruit
Sapindus mukorossi
Soapnut, and a saponin wash. In Sun Blonde alone — a pale shade needs a clean fibre to land on. What that does to color uptake specifically, we have not measured.
Shikakai
Acacia concinna
Known as fruit for the hair, and the most acidic thing we mill. Acid conditions let cuticle scales lie flat. Also in Sun Blonde alone, alongside reetha.
Bhringraj
Eclipta prostrata
Ayurveda calls it Kesharaja, the king of hair. In all six of these, and in 22 of our 24 — it carries no pigment, so it never affects the shade.
Brahmi
Bacopa monnieri
A scalp herb in Ayurvedic tradition rather than a pigment, and color-neutral like bhringraj. Two unrelated plants are sold as brahmi; ours is Bacopa monnieri.
Methi Seed
Trigonella foenum-graecum
Fenugreek. Its galactomannan mucilage keeps the paste smooth and easy to spread evenly. In three of these six.
Eleven organic herbs, three jobs, and no indigo anywhere. Five of these six are henna-based, so what separates them is how much colorless henna sits above the henna and which red joins it below. Sun Blonde is built differently from all of them — it is the only shade in our whole range with neither henna nor indigo in the pouch.
No indigo. No green stage, no three-day wait — and no ash tones either. Six shades below, photographed on real hair under the same light.
See All 24 Shades →Indigo-Free Collection
Indigo-Free Shades
Six fully herbal shades made completely without indigo.
Herbal Color, Indigo-Free
Gentle for Sensitive Scalps
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Before you choose
If you reacted to a plant hair colour, it may not have been the indigo.
This is the part we would rather say before selling you anything. People arrive on this page because something went wrong, and often because someone told them indigo was the cause. Sometimes it is. But the evidence around hair dye allergy points somewhere else first, and it is worth knowing where.
| PPD para-phenylenediamine | Natural indigo Indigofera tinctoria | |
|---|---|---|
| In the standard patch test series | Yes, for decades | No |
| Prevalence in the general population | 0.8%1Five European countries, 2,739 people patch tested | No published figure3Because it is not routinely tested |
| Among dermatitis patients who were patch tested | ~4% in Europe2ESSCA network, 12 European countries | Case reports only3Published 2020 and 2025 |
| Named Allergen of the Year | 2006, by the American Contact Dermatitis Society | — |
The number that explains the confusion
In that same European study, people who had ever had a “black henna” temporary tattoo tested positive for PPD at 3.2 per cent, against 0.6 per cent in people who had not — adjusted odds of 9.33 to one.1
Black henna is not henna. It is henna with PPD added to make it stain black quickly. The same substitution happens in powders sold as indigo: if something labelled indigo turns hair black in under an hour with no henna step, a synthetic dye is doing the work. A person who reacts to that product has reacted to PPD, and may reasonably conclude that plant colour is the problem.
And the part that cuts the other way
We are not going to tell you indigo is harmless. The absence of a prevalence figure is not evidence of absence — substances that sit outside the standard patch test series are known to be under-recognised, precisely because nobody is looking for them systematically. Contact dermatitis to pure Indigofera tinctoria has been documented in the dermatological literature, and those cases are real.3
There is also a published case of a person allergic to PPD who went on to react to pure henna, black tea and pure indigo powder as substitutes.4 Avoiding one ingredient does not guarantee you will tolerate the next one.
So here is what we will and will not say
- We will tell you what is in the pouch. Six of our twenty-four shades contain no indigo. The full ingredient list for every shade is on its product page and printed on the pack.
- We will not tell you they are safe for you. Removing indigo does not make a product hypoallergenic. Every one of the six contains other plants, and any plant can sensitise someone.
- If you have reacted to a hair dye before, see a dermatologist for professional patch testing before you use any plant colour, ours included. That testing will tell you what you actually react to, which is information no product page can give you.
- Patch test 48 hours before every application, even after that, and even if previous applications were fine. Sensitisation can develop with repeated exposure.
If You React to Indigo
What indigo-free can do—and what it honestly cannot.
Indigo is the only blue pigment in herbal color, and the only plant that makes it dark. Leaving it out opens a real range, and closes another. Better to know both before you choose.
Six shades, blonde through to deep red
All built on henna and warm-pigmented plants, with no indigo at any stage.
- Beige Blonde — the most neutral of the six.
- Champagne Blonde — light with a fine golden shimmer.
- Sun Blonde — bright gold, and the one shade with no henna at all.
- Caramel Blonde — the deepest blonde, on the border of light brown.
- Strawberry Blonde — blonde carrying a clear red warmth.
- Wine Red — the deepest shade open to you here.
What indigo was doing in the other shades
Every one of these limits comes from the same fact: indigo is the plant that darkens and cools plant color, and it is the one being left out.
- No black or dark brown. Henna cannot reach those depths on its own—indigo is what turns its red into brown and black.
- No ash or cool tones. Indigo is the only cool pigment available in plant color.
- Gray coverage reads warm. On white strands these shades develop golden to coppery rather than neutral.
This is the honest trade. If a warm result is not what you want, indigo-free herbal color may not be the right route—and we would rather say so here than let you find out afterwards.
Please patch test, every time. If you have reacted to a hair color before, do a skin patch test 48 hours ahead—even with a product you have used previously, and even though there is no indigo in these six. We can tell you exactly which plants are in the pouch; we cannot tell you how your skin will respond to them. If you have a diagnosed allergy, or have been told to avoid chemical hair dye for a medical reason, please speak to your doctor or dermatologist before using any hair color, including this one.
Natural vs. Certified Organic
Same word on the shelf. Very different rules behind it.
Both labels sound like the same promise. Only one of them has to be proven to someone other than the brand making the claim—which matters more than usual when an ingredient list is something you need to trust.
“Natural” on a hair color box
There is no legal definition of “natural” in cosmetics in the US or the EU, so the claim is left to the brand.
- No minimum plant content. A product can be mostly synthetic and still use the word.
- Synthetic dyes may still be inside. PPD and its relatives, such as PTD, are found in products marketed as natural or herbal.
- Ammonia and peroxide are not ruled out. Nothing about the word excludes them.
- Nobody has to check. No audit, no inspection, no farm-level traceability.
This isn’t an accusation against any particular brand—it’s simply what the word does and doesn’t guarantee. Which is why the ingredient list matters more than the front of the box.
COSMOS ORGANIC, audited by ECOCERT
The strictest organic standard written specifically for cosmetics—and the one Radico has held since 2012.
- Certified organic plants, start to finish. The farms, the supply chain and the finished pouch are all inside the standard.
- No PPD, no PTD, no synthetic dye of any kind.
- No ammonia, no peroxide, no resorcinol, no synthetic preservatives or fragrance.
- Verified by outside auditors, not by our own marketing team.
In 2012 Radico became the world’s first hair color brand to earn COSMOS ORGANIC, and we have held it through every annual audit since.
The Formula
Every Shade Is a Recipe
There's no dye in the hair powder—only plants. Each list below runs in order of quantity, exactly as it appears on the pouch, so the first name is doing the most work.
Every herb here is certified organic, and nothing else goes in. Eleven plants across these six recipes, and no indigo anywhere.
Its Role in This Blend
What It Actually Does
100% certified organic
