Seven herbs and water
Dark Brown: The Shade
Most People Start With
A brown close to where naturally dark hair already sits — near enough that regrowth doesn't draw a line, warm enough that grey blends in. Seven certified organic herbs, mixed with water, nothing else. We tested it, measured it and photographed it for three days. Start with the question you came here with.
What do you want to know first?
Pick one and we'll take you through the parts that answer it.
Certified COSMOS ORGANIC by ECOCERT — audited from the farm to the sealed pouch. Radico has held organic certification for its hair colour since 2012.
Not a list of things left out. A list of things the method never needed.
The one thing to know before you start: let it dry slowly. Dark Brown keeps developing while hair is damp. Wrap it in a towel or let it dry on its own. Dried fast — even with a cool fan — it lands lighter and redder, and it doesn't catch up later. See the test
The Drying Test
One Paste, Three Ways to Dry.
Only the Fast One Missed.
We put Dark Brown on three white swatches — white so nothing underneath could hide the result, the closest stand-in for grey. Same paste, same 60 minutes, same rinse. The only thing we changed was how the hair dried. Then we photographed all three at 90 minutes, 24, 48 and 72 hours.
Paste: 1 part powder to 3.5 parts water by weight · 60 minutes on the hair · room at 76°F. The fourth swatch is the undyed control.
Top to bottom: fan (cool air), natural drying, towel drying, undyed control. Shot indoors by a window, so the daylight differs from photo to photo — compare the swatches inside one photo first.
The same three swatches, side by side
Each tile is cut from the same spot on the swatch in every photo. The numbers are read from those tiles: L* is lightness (lower is darker), a* is redness (higher is redder).
Dried fast, it kept moving — toward red
The fan-dried swatch started olive-gold and darkened every day, but its redness doubled (a* 4.8 to 9.9) and at 72 hours it was still the lightest of the three. It never became Dark Brown.
Dried slowly, it was brown at 90 minutes
Natural and towel drying were already Dark Brown by the first photo and moved only a little over three days. Most of the colour forms while the hair is still damp.
Towel or natural: too close to call
The towel-dried swatch read slightly darker in most photos, but the gap is smaller than the variation inside each swatch. Either works. The fan is the one that doesn't.
Let it dry slowly. No blow dryer — not even on cool.
The fan in this test blew room-temperature air. Heat wasn't needed to stop the colour — drying fast was enough. Wrap your hair in a towel after rinsing or let it dry on its own, and keep it off the dryer for the first 24 hours.
Why drying speed changes the colour
Dark Brown is mostly henna and indigo. Henna's colour, lawsone, is already in the leaf. Indigo's isn't — the leaf holds a precursor that water releases as indoxyl, and two indoxyl molecules join in air to form blue indigo. That reaction runs in water, on the hair.
Take the water away in five minutes and the indigo stops forming. What kept developing on the fan-dried swatch over the next three days was the warm side — most likely the henna, which is known to deepen for a day or two after rinsing — with not enough blue on top to turn it brown. That is why a fast-dried Dark Brown reads lighter and redder rather than purple.
We ran the same test with indigo on its own: the fan-dried swatch came out yellow-green, the towel-dried one blue-green. See the indigo test
Three things that help it finish
If it lands lighter, redder or patchy
Lighter and redder than you expected is what the fan-dried swatch shows, and it is the result we hear about most. It usually means the hair dried too fast, or the paste came off before 60 minutes. It doesn't reverse on its own, but it isn't damage: indigo alone for an hour is how most people bring it back to brown, and it can go on the same day.
A green or grey cast that never clears is a different problem — development stopped because of water pH, minerals, or product residue on the hair. We have not seen a green stage on Dark Brown in our own tests; whether some hair types show one, we don't yet know.
Too light or too orange · Green that won't clear · Hard water · First-time customer support
How we measured: each tile is the median colour of that patch of swatch, with shine highlights left out, converted from the camera's sRGB to CIELAB. Paper in every photo was checked to be close to neutral. A phone photo is not a lab colorimeter: treat the numbers as a fair comparison between swatches, not as absolute values.
Measured in the Bowl
pH 5.96.
On the Same Side as Your Scalp.
We mixed Dark Brown the way we tell you to and put a meter in it. Seven herbs and water read mildly acidic — nothing was added to push the number either way. Permanent box dye is made alkaline on purpose. This paste has no step that does that.
Where 5.96 sits
~5.5 Neutral
7 Permanent dye
9–11
Scalp and permanent-dye values are published figures (sources below). Only 5.96 is our own measurement.
A permanent dye mixes an alkali with peroxide so that the hair swells open and the colour can get inside. Dark Brown doesn't need the hair open. Henna's lawsone bonds to the keratin and indigo settles into the cuticle surface. Neither needs the hair forced open, so there is no alkali in the bowl and nothing to neutralise afterwards.
5.96 is a little above the scalp's usual 5.5. Close, not identical — and we would rather show you the real number than round it.
What a pH number doesn't tell you
It isn't a promise that nobody reacts. Henna and indigo are plants, and a small number of people are sensitive to them — do a patch test before your first application, whatever the pH.
It isn't the whole difference either. Some demi-permanent dyes sit near pH 6–8 too. What separates them from this paste is the developer: Dark Brown has no peroxide, no ammonia and no PPD, at any pH.
Mixing it the same way: start with 100 g of powder and 300 g of water, stir for two to three minutes, then add 50 g more water. That is the 1 : 3.5 we measured. How to apply
Scalp pH ~5.5: Gavazzoni Dias MF et al. The shampoo pH can affect the hair: myth or reality? Int J Trichology. 2014;6(3):95–99. PMID 25210332. · Permanent colour pH 9.0–11.0, demi-permanent 6.0–8.0: Hair Colour for Hairstylists: Level 2, BCcampus Open Education, ch. 1. · Dark Brown reading: Radico USA, Torrance CA, single measurement with a YINMIK food pH meter.
How It Works
One Forces Color In.
The Other Layers It On.
Both methods involve oxidation. The difference is what gets oxidized — your hair, or only the dye.
Conventional Brown Dye
Oxidizes
Your Hair
- Ammonia and peroxide pry the cuticle open, and the peroxide dissolves the melanin already inside
- The reaction doesn't stop at the melanin. It also breaks the sulphur bonds that hold the fibre together, so hair gets rougher and drier with each round
- Hair is dead tissue. It cannot rebuild what the reaction took — the damage stays until you cut it off
Dark Brown
Oxidizes
Only the Dye
- Water carries the plant pigment onto the fibre. Henna's lawsone bonds to the keratin; indigo's pigment settles into the cuticle surface. Neither one needs the cuticle forced open
- The oxidation happens in the pigment, not in your melanin. Your own colour is still underneath — which is why a plant brown has depth instead of sitting flat on every strand
- Nothing was dissolved, so nothing needs repairing. That is what makes it repeatable on the same hair, over and over
Brown is a shade people touch up rather than commit to once — roots every few weeks, ten or more rounds a year. With a chemical brown, each of those rounds spends a little of the fibre, and the fibre never gets it back.
A hair sits on your head for two to six years before it sheds. Over that span, the question isn't whether one application damaged it. It's what twenty did. Layering doesn't answer that by repairing anything — it answers it by never starting the process.
What this doesn't mean
Plant colour is not a treatment. It won't repair damage that is already there, and it won't lighten hair — Dark Brown goes onto your colour, so it can only go darker or warmer, never lighter. Hair can feel dry or straw-like for the first few days while the cuticle settles. Hard water and high porosity both change the result. Those are real, and we'd rather you hear them from us.
The Sunlight Test
Brown in the Shade.
Warmer in the Sun.
A bottled brown is one engineered pigment, so it returns the same flat tone in every light. Dark Brown is several plant pigments at once — warm ones and cool ones sitting on the same strand — and strong light doesn't pull on all of them equally. Indoors the cool side reads first. Outside, the henna underneath comes forward.
Both photos are Dark Brown. They were taken on different occasions, so treat them as an illustration of the shift — not as a controlled side-by-side.
This is what dimension actually means.
A chemical brown replaces your pigment with one uniform colour, so every strand returns the same tone and there is little left underneath for light to reach. Plant pigment layers over hair that was never uniform in the first place — the variation isn't added by the product. It was already yours.
Posted by customers
Dark Brown on Real People
These are their own photos, in their own lighting — not shot by us and not retouched. All of them are finished results, taken after the colour had settled. Read them as a range, not as a swatch.
Where we know the starting hair, it's listed. Where we don't, we left it blank rather than guess.
Dark Brown — Colour Me Organic$25.24$22.95Save $2.29Shop Dark Brown
Free shipping over $25.00
Depth and warmth shift with your starting colour, grey percentage, porosity, and how long you leave it on. Dark Brown lands warmer on lighter starting hair and cooler on darker — the same pouch does not give the same brown to everyone.
What's Actually Inside
The Same Seven Herbs
as Brown. A Different Order.
Dark Brown and Brown contain exactly the same seven plants — not one more, not one less. Put the two ingredient lists side by side and the first two names match. From the third, they swap.
Tap a herb to see its active compound and the evidence behind it
Here is what the order tells you, and it's printed on the pouch. Ingredient lists run in order of quantity. On Dark Brown, amla sits third and manjistha fifth. On Brown, it is the other way round.
Amla is the acid that pulls henna's orange down toward a cooler brown. Manjistha is the root that warms the red underneath. Put the cooling herb high and the warming herb low, and you get Dark Brown. Reverse them, and you get Brown. Same seven plants, opposite priorities.
We don't publish the ratios. The proportions for each of the 24 shades are held by one person at our production facility in India. What we can hand you is the order they appear in — and on these two shades, that order tells you most of what you need to know.
Top 5 shades by units sold
Remaining 19 shades account for the balance.
What People Actually Buy
The shade that outsells the spread.
There are 24 shades. If people picked at random, each would take about four percent. Dark Brown takes more than six times that — and Soft Black, second, takes nearly five.
Between them, two shades account for almost half of everything sold. The range is wide; the demand isn't. Most people coming off chemical dye are not looking for a new colour. They are looking for the one they already had, without the peroxide.
Radico USA sales data, March 21, 2024 – March 20, 2025. Share of Colour Me Organic hair colour units sold across 24 shades. Units, not customers — Dark Brown is also the shade people repeat most, so its unit share runs ahead of its share of buyers. Direct-to-consumer orders only; wholesale excluded.
Ready When You Are
The One Most People
Land On.
You have seen what is in it, how it works, and what three days of drying do to it. If a brown close to your own is what you're after, this is the shade that gets there.
Dark Brown — Colour Me Organic
Certified organic hair colour powder · 3.5 oz
- Seven organic herbs, nothing else. No base, no carrier, no synthetic pigment
- Covers up to three applications on short hair — roughly 1.1 oz short, 2.2 oz shoulder-length, the full pouch for waist-length
- Kit includes brush, gloves, shower cap and instructions
- Vacuum-sealed and resealable — the herbs keep better before they meet air
Free shipping on orders over $25.00
One more time, because it matters: let it dry slowly. Wrap it in a towel or let it dry on its own — a blow dryer, even on cool, leaves Dark Brown lighter and redder, and it doesn’t catch up later. Give it until day three before you decide anything.
If it doesn't work on your hair, tell us
We have said all through this page that plant colour behaves differently on different hair, and we meant it. First-time customers who don't get the result they expected can have the same shade sent again, a different shade sent free, or a full refund on the colour — no argument required. It is easier for both of us if you try it than if you spend another month wondering. How the assurance works →
Before you use it: this shade contains indigo, which a small number of people react to. Do a patch test first, especially if you have sensitive skin or a history of reactions to plant dyes. Stop use if irritation occurs.