Why is my hair turning green when I dye it? 2 possible reasons and solutions

how to turn it to ashy

Is your hair turning green when you dye it? I’m sure it’s for either one of two reasons.

  • Your hair may turn green when you dye it because you’re making a bad color choice. As a result, the predominant shade is greenish.

Solution: Choose the right color level and reflect to avoid your hair looking greenish. Here’s how to do it step by step.


  • Also, your hair may have turned green when you dye it because you tried to darken it a few shades.

Solution: give your hair back the color it needs with a pre-pigmentation. Then, dye it again. Here’s how to do it step by step.


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Green hair is the curse of both light or dark blonde hair. Some darker and browner manes can also turn a bit greenish as a result of the hair dye.

Do you want to know why?


I can think of two possible reasons.

Right now, we’ll analyze each of them.

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Did you make the wrong color choice?

due to chlorine

Many times clients come to my salon to fix the wrong hair color.

When I ask them about the color they applied to their hair, they usually have no idea. Can you believe it?


They colored their hair, and they don’t know what color they used. Unbelievable!

Beyond the craziness of this situation, I took some time to think about why this is happening.

Why is it that so many women apply the wrong color to their hair? Do you want to know my conclusion?


It’s simple.

When people buy hair dye, they only consider the pictures on the boxes. Those pictures have perfect manes and amazing colors. Of course, that’s the answer!

They only choose hair dyes because of the pictures on the boxes. However, they should be looking at the numbers and the shades.

 Tell me the truth, did you choose the hair dye by the picture or by the little number on one of the corners of the box? .


I’m sure that the photos of the hair dye boxes have a dazzling mane. However, it’s just a marketing strategy. Usually, the results of the hair dyes are different from the amazing hair shown on the boxes.


So, if you have chosen the wrong hair dye, stay with me because I’ll tell you everything you need to know to choose your hair dye like a professional.


How to choose the right hair dye to prevent your hair from turning green

at the store

Hair color is the frame of our face. We all want it to look majestic.

Our hair is so important to us that wearing the wrong color can even affect our mood.


If your hair turns greenish, chances are you are choosing the wrong reflects/tones of your hair dye.

How so?

  • The first number is the color level. The scale goes from one to ten. For example, 1.0 is black, 5.0 is light brown.
  • The first number after the period, or slash, is the primary reflect or tone.
  • The second number after the period, or slash, is the secondary reflect or tone.


Let’s an example, 7.21

7 is the color level. It’s blonde. The .2 is the primary tone, and the 1 is the secondary tone, which gives the optical effect to the hair color.


The cool tones can be bluish, iridescent, or greenish. They’re represented by numbers that can vary according to the brand.


  • Green or blue = .1
  • Double blue or green = .11
  • Matte Green = .7
  • Iridescent = .2


 If you’re choosing a hair dye with cool reflects, your hair will probably turn a strange medium-greenish color. .


So, which hair color should you choose?

From now on, I advise you not to choose reflects that are too cool.

Instead,  choose hair dyes without reflects or those with some warm shades to balance your hair color.  Before you color your hair with the right color, you should remove the greenish shade.


Can you fix your hair if it turned green after applying a hair color with cool reflects?

Everything has a solution in this life when it comes to hair color. Your hair is already green! I don’t want to lie to you. Although everything has a solution, it’s not that easy.

One of the many colorimetry rules says that you cannot apply a warm one over a cold tone. Cold tones dominate and neutralize warm tones.


 Therefore, the only way you can get rid of that greenish reflect is to go to the salon. In turn, if you’re more daring, I’ll show you how to do it at home. .


How to get rid of green reflects at home (only for the bold ones)

medium brown and light brown

If you’re reading this, you’re brave!

Either you really can’t stand that green shade anymore, or you’re not financially able to go to a salon.


The first thing you’ll do is a light homemade bleach with bleach powder and 10-volume peroxide to get rid of that greenish shade. It’s a quick and easy procedure that you can do yourself.

You’ll need:

  • a bowl
  • gloves
  • a hair dye brush
  • two spoonful of bleach powder
  • 80ml of 10 volume-peroxide


  • Prepare the mixture and apply it to your hair without touching the roots.
  • Massage strand by strand for about 10 minutes.
  • The hair dye will be gone as if by magic.
  • Finally, choose the right hair dye and color your hair following the manufacturer’s instructions


Now you know how to both choose the right hair dye and get rid of the unwanted shade.


Did you try to darken your hair, and it turned green?

hair salon

When we darken blonde hair, the result is a greenish shade. Why does this happen?

When hair is lightened, certain tones are removed to modify the color. Then, to darken it, you have to restore the tones that had been removed in the lightening process.


 The pigment that is missing must be restored to build up the color. .

To do this, we use a pre pigmentation technique and a chart that tells us the shades that can be used for this process.

Did you think it was easier?


No, my dear friend. The math of color is exact. There aren’t miracles. Nothing is by chance.

Colorists use a table to pre-pigment. It isn’t difficult as the periodic table of the elements. So, don't be scared!


Since I don't want to complicate your life, I’ll give you a trick to dye your hair and definitely get rid of that green tone.

You need to choose a hair dye that is the same level as the shade you are using, but it should have warm highlights.

The warm highlights are:

  • Red = .6
  • Mahogany = .5
  • Copper = .4
  • Gold = .3


For example, if you dye your hair brown level 5, choose a brown with warm reflects and tones.

For example, 5.43.


  • Prepare the hair dye with equal parts of tap water.
  • Apply the mixture to your hair and leave it on for approximately 15 minutes.
  • Then, remove the excess with a paper napkin.


You’ll be able to restore the warm pigments to your hair. Now, you’re ready to color your hair with the usual color.

I assure you that your hair will no longer be green when you dye it.

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