Purple, or red? Both, depending on who you ask.
If you used an indigo-rich shade — Soft Black, Dark Brown, Brown — and your hair came out purple, this page is about what happened.
We get reports of both. Two people can use the same pouch of Soft Black, have the same thing go wrong, and one will describe the result as purple while the other calls it red. They are not describing different problems. They are describing the same one, and the wording depends on where in the range it landed and on the light they looked at it in.
So if "purple" is what brought you here but the photos below look red to you, you are still in the right place.
What actually happened
Indigo is the only herb in the pouch that is still working after you rinse. Henna and manjistha have already bonded by then. Everything that happens in the hours after the rinse decides one thing: whether blue arrives to cover them.
Indigo only develops while the hair is damp. Dry it fast — a hair dryer, or simply very dry air — and it stops where it is. What you are looking at is not indigo turning purple. It is the red underneath, showing through because the blue never finished.
Why purple, and not plain orange
Henna on its own gives one colour: warm orange. If henna were the only thing under the blue, orange is what you would see.
But Soft Black has two red pigments, and the second one is the reason the word "purple" comes up at all:
| Soft Black | 1st | 2nd | 3rd | 4th | 5th |
|---|---|---|---|---|---|
| Ingredient | Indigo | Henna | Manjistha | Amla | Bhringraj |
Manjistha is a blue-leaning red — a root that reads closer to wine or plum than to copper. It sits third on the list, high enough to matter. Whatever residual blue is present shifts it further that way.
So the result lands somewhere on a range: plum, wine, red-violet, rust. Two people looking at the same head will pick different words for it. See where manjistha sits in your own shade →
The test
We dyed grey hair swatches with Soft Black from the same pouch, blow-dried one and towel-wrapped the other, and photographed both together.
One hour after rinsing
Top: blow-dried straight after rinsing. Bottom: towel-wrapped and left to dry. Same pouch, same paste, same hour of processing, both in the same frame under the same light. The difference is not the photography.
72 hours after rinsing
This is the part people are most often surprised by. Over three days the two swatches move in opposite directions:
- Air-dried keeps deepening. It is visibly darker at 72 hours than it was at one.
- Blow-dried does not deepen at all. It shifts further towards warmth — the red becomes more prominent, not less.
Waiting does not close the gap between them. It widens it. The full test, with Light Brown as well →
It does not reverse
We have to correct something we used to say on this page. We previously suggested that if you caught it within a day, dampening the hair and wrapping it in a towel could restart the process.
We tested that. It does not work. A swatch that had already dried this way stayed exactly as it was after re-wetting and wrapping — adding moisture back does not restart a reaction that has stopped.
So there is no rescue for a result that has already dried. We would rather tell you that plainly than have you spend a week misting your hair for nothing.
What you can do:
- Colour again. Herbal colour deposits — nothing was stripped out of your hair, so a second application can add the blue that is missing. Apply the same shade, or indigo on its own to pull the warmth down. Organic indigo leaf powder →
- Let it fade. Indigo is held in the outer layers rather than bonded like henna, so a plant colour does soften with washing over a few weeks.
- Take us up on the assurance. If this was your first order, we will send a different shade free or refund the colour. How it works →
Next time
The instruction is not "wait 72 hours." It is don't dry it. The colour keeps developing for as long as you let the hair stay damp.
- No dryer after rinsing. Not warm, not cool, not for thirty seconds. This is the one thing that cannot be undone.
- Wrap it in a towel and let it dry as slowly as it will.
- If your air is dry, slow it down further. A humidifier, or a bathroom with the shower run hot for a few minutes. Hair that dries in twenty minutes on its own has the same problem as hair that was blow-dried.
- Nothing else for two days. No shampoo, no hot tools. Water only if you need to rinse.
- Green at the rinse is normal. That is indigo mid-reaction, and it clears on its own within a day or two. Reaching for the dryer because of it is exactly how green becomes purple.
That last one matters more than it sounds. On grey hair, or on hair around two tones lighter than the shade you applied, the green stage is clearly visible — there is no pigment underneath to hide it. It looks alarming and it is not. Some of the purple results we hear about start with someone seeing green and reaching for a dryer.
Which shades this applies to
Any shade with indigo in it, which is 18 of our 24. It matters most where indigo leads the ingredient list — Soft Black, Dark Brown, Brown, Light Brown, Copper Brown and Violet — because those have the most blue to lose. Men's Soft Black behaves the same way.
Six shades contain no indigo at all: Champagne Blonde, Strawberry Blonde, Beige Blonde, Caramel Blonde, Wine Red and Sun Blonde. This cannot happen to those.
If it doesn't quite match
Drying too fast is the most common cause, but it is not the only way a dark herbal shade comes out warm. If your hair was already warm when you rinsed it out — no green stage at any point, no change over the following days — the paste probably came off before indigo had done its part, which is a different problem with a different answer.
The three causes, told apart →
A note on how we say this
Nothing above is unique to us. Any herbal hair colour built on indigo behaves this way, whoever packs it, because it is a property of the plant rather than of a brand. If a product promises you that its indigo will not do this, that is worth a second look at the ingredient list.
Our test was one run, one batch, on grey swatches, and we did not record the humidity. Swatches also dry faster than hair on a scalp, so on your own head there is probably a little more margin than these had. But there is no reason to bet on it.