Why Indigo-Based Natural Hair Color Sometimes Turns Purple
If you've used a natural hair color containing a high amount of Indigo—such as Soft Black or Dark Brown—and your hair turned purple a few days later, don't worry. This usually means the Indigo didn't finish developing properly, not that the product has failed.
Let's look at why this happens and how to prevent it.
Why Does Indigo Turn Purple?
Unlike chemical hair dyes, Indigo develops its color naturally by reacting with moisture and oxygen.
Normally, Indigo changes through the following stages:
Green → Blue → Deep Black or Dark Brown
If this natural oxidation process stops halfway, the color can remain purple instead of becoming dark.
The Two Most Common Reasons
1. Using a Hair Dryer Too Soon
This is the most common cause.
If you dry your hair immediately after rinsing the herbal paste, the moisture that Indigo needs disappears too quickly.
Without enough moisture, Indigo cannot complete its oxidation.
Result:
Purple hair instead of deep black or brown.
2. Dry Air
Even if you never use a hair dryer, very dry air can cause the same problem.
If your hair dries too quickly naturally, Indigo may stop developing before reaching its final color.
How to Dry Your Hair Correctly After rinsing out the herbal paste:
✓ Do not use a hair dryer
Allow your hair to dry naturally.
✓ Wrap your hair in a towel
Gently towel dry, then wrap your hair.
This helps keep moisture in the hair while Indigo continues developing.
✓ Keep the hair slightly moist
During the first 2–3 days, moisture actually helps Indigo finish oxidizing.
If you live in a dry climate, a little extra humidity can improve the final color.
Example: An experiment in dyeing hair with Our Soft Black containing indigo.
1 Hour After Dyeing
Hair Dryer (Hair sample at the top of the photo)
- Color appears lighter
- Development has already slowed
Natural Drying (Hair sample at the bottom of the photo)
- Color begins developing evenly
72 Hours After Dyeing
Hair Dryer (Hair sample at the top of the photo)
- Purple tone remains
- Indigo oxidation stopped early
Natural Drying (Hair sample at the bottom of the photo)
- Deep black or dark brown develops naturally
The same principle applies to Soft Black, Dark Brown, and other Indigo-rich shades.
What If Your Hair Is Already Purple?
Within the First 1 Days
There is still time.
Lightly dampen your hair and wrap it in a towel for several hours.
Sometimes the added moisture allows Indigo to continue oxidizing.
After 2–3 Days
Unfortunately, once Indigo has completely stopped oxidizing, adding moisture will no longer change the color.
In this case, the best solution is to recolor the hair.
How to Prevent Purple Hair
✔ Let your hair dry naturally after rinsing.
✔ Avoid using a hair dryer during the first few days.
✔ If your hair seems to be drying too quickly, lightly mist it with water and wrap it in a towel.
✔ Give Indigo about 72 hours to fully develop before judging the final color.
Final Thoughts
Natural hair color is very different from chemical dye.
Instead of forcing color into the hair with chemicals, Indigo develops gradually using time, oxygen, and moisture.
If you understand this process, you'll achieve much richer and more natural-looking results.
🌿 New to Organic Hair Color?
If your first application doesn't turn out as expected, please don't feel discouraged.
Completely additive-free natural hair coloring often involves a learning curve. You're not alone.
At Radico USA, we understand that everyone's hair is different. That's why we offer a First-Time Customer Assurance.
If your first application doesn't produce the result you expected, we'll gladly:
- Send you a different shade at no charge, or
- Provide a full refund.
We especially see purple tones most often with our Indigo-rich shades, such as:
- Soft Black
- Men's Soft Black
- Dark Brown
- Brown
If you're looking for a truly 100% organic herbal hair color, we'd love for you to explore our shades. Our customer support team is always happy to help you find the color that works best for your unique hair type.
Every head of hair is different—but together we'll find the shade that's right for you. 🌿
Discover 24 beautiful shades made with only certified organic herbs.