Radico's darkest shade
Soft Black: A Black That
Looks Like It Grew That Way
Natural black hair isn't flat black — in sunlight a deep, warm brown comes through. Soft Black is five organic herbs, mixed with water, built to sit in that same range. 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. Wrap it in a towel or let it dry on its own. Dried fast — even with a cool fan — Soft Black lands as a reddish brown instead of black, and it doesn't come back on its own. Depth varies with your starting colour, grey percentage and porosity. See the test
The Drying Test
One Paste, Three Ways to Dry.
Only the Fast One Missed Black.
We put Soft Black 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 went reddish brown
The fan-dried swatch started olive-gold, then darkened every day — by 72 hours it was as deep as the others, but about four times as red (a* 8.2 against about 2). Deep, but never black.
Dried slowly, it was nearly done at 90 minutes
Natural and towel drying were already a deep, neutral brown-black in the first photo. Their redness stayed close to zero for three days. That neutral base is what Soft Black is for.
Towel or natural: too close to call
Which one read darker changed from photo to photo. 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
Soft Black is mostly indigo, with henna underneath. 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. Soft Black leans on indigo more than any other shade, so when the indigo stops early, the difference shows most here: a black turns into a reddish brown.
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 red, brown or uneven
Reddish brown instead of black is what the fan-dried swatch shows — 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 toward black, 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. On our white swatches Soft Black showed no green or blue stage at any point; whether some hair types show one, we don't yet know.
Fixing a purple result · Green or blue 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 6.05.
On the Same Side as Your Scalp.
We mixed Soft Black the way we tell you to and put a meter in it. Five 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 6.05 sits
~5.5 Neutral
7 Permanent dye
9–11
Scalp and permanent-dye values are published figures (sources below). Only 6.05 is our own measurement.
A permanent dye mixes an alkali with peroxide so that the hair swells open and the colour can get inside. Soft Black 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.
6.05 is a little above the scalp's usual 5.5 — the highest of the shades we have measured so far, and still on the acidic side of neutral. 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: Soft Black 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. · Soft Black 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 Black 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
Soft Black
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 color is still underneath — which is exactly why the shade has depth instead of looking flat
- Nothing was dissolved, so nothing needs repairing. That is what makes it repeatable on the same hair, over and over
Black is the shade conventional dye works hardest for — the most lifting, the most pigment forced in, and the most frequent touch-ups. Soft Black gets there by layering instead.
A single hair stays on your head for two to six years before it sheds. Coloring it this way doesn't make it healthier than it was born — it means those years can pass without the damage stacking up.
What this doesn't mean
Plant color is not a treatment. It won't repair damage that is already there, and 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
Natural Black Isn't
Actually Black.
Take black hair outside and it stops looking black. The melanin in dark hair absorbs most of what hits it, but not all — under strong light, the red end of the spectrum comes back through, and you see warm brown. Soft Black is built to behave the same way, which is why it looks like hair rather than like a coat of paint.
Both photos are Soft Black on the same hair. They were taken on different occasions, so treat them as an illustration of the shift — not as a controlled side-by-side.
This isn't a finish effect. It's the reason the color has depth at all.
Synthetic black lays down one flat pigment across every strand, so it reflects the same way in every light. Plant pigment sits over the melanin you already have — and since your own hair was never uniform to begin with, neither is the result.
Posted by customers
Soft Black on Real People
These are their own photos, in their own lighting — not shot by us and not retouched. A dark shade is exactly the kind of color a phone camera renders differently every time, so 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.
Salon = applied by a professional, usually with a longer processing time than most people give it at home.
Soft Black — Colour Me Organic$25.24$22.95Save $2.29Shop Soft Black →
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Depth and warmth shift with your starting color, gray percentage, porosity, and how long you leave it on. These photos show what the shade can do, not what it will do on every head of hair.
What's Actually Inside
Five Herbs.
The Shortest List We Make.
Our browns run to seven plants. Soft Black uses five — and it is the darkest shade in the range. Depth here isn't built by adding more; it comes from what sits at the top of the list.
Tap a herb to see its active compound and the evidence behind it
No hibiscus, no methi, no colourless henna. The herbs that soften, cool from the side or dilute the mix in our lighter shades are all absent here. The paste still mixes and spreads perfectly well without them — they were never structural. They were adjustments, and this shade doesn't need any.
Here is what the order tells you, and it's printed on the pouch. Ingredient lists run in order of quantity. Every brown and black we make opens with indigo and henna. What separates them is everything that comes after — and on Soft Black, very little does.
Manjistha sits third, warming the red register so the black doesn't read blue. Amla fourth, keeping the tone from tipping warm. Two adjustments, and that's the whole formula. A darker shade doesn't need more herbs; it needs fewer things pulling in other directions.
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.
Top 5 shades by units sold
Remaining 19 shades account for the balance.
What People Actually Buy
Second only to Dark Brown.
Of 24 shades, Soft Black is the second best-selling. The shade above it and the shade below it are both browns — which means the darkest end of the range is not where most of the volume sits. For a plant colour line, that is worth knowing: black is the shade people approach most cautiously.
What the number doesn't tell you is why anyone picked it. We can count units; we can't read intentions. If you want black and you want it soft, this is the one — but that is our description of the shade, not something the sales figures prove.
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. Direct-to-consumer orders only; wholesale excluded.
Ready When You Are
Three Days, One Pouch,
and No Peroxide.
You have seen what it is made of, how it works, and what three days of drying do to it. If that sounds like something you want to try, this is the shade.
Soft Black — Colour Me Organic
Certified organic hair colour powder · 3.5 oz
- Five 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
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.