Does Your Hair Grow Back the Same Color After You Dye it?

woman looking at the roots of her hair

New hair that grows at you roots will always be your natural color, the same color you had before you used the dye.
Because when you use the permanent dye, the chemical reaction that causes the change in your color only happens to the hair you’ve dyed.
That’s why after about 45 days, you need to touch up the dye so your roots, that are your natural color, will look even with the rest of your hair.

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Today something very weird happened to me at the salon.

Actually, I should say I heard something very weird come out of one of my client’s mouths.

After I dyed her hair, she looked in the mirror, and happily said, “Alejandra, you’ve made a miracle.”

A miracle. Well, the truth is a lot of my clients feel like I make miracles on their hair. But, even so, what she said caught my attention and I asked her why she thought I’d made a miracle.

And she said to me: “ Because now my hair will be the color I always wanted it to be, even the new hair that grows in.”

WHAT?!

No, wait. Your new hair always grows in your natural color, that same color that God, Jehovah, Buddha or whatever you want to call it, chose for you.

There isn’t any kind of dye that can change the natural color of your hair as new hair grows.

roots always have the natural hair color

Because the only color you can change is the color of the hair that you used the dye on.

So, to make it crystal clear, let’s sum it all up in one phrase.

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Even if you dye your hair, the new hair that grows will be your natural color

natural colored roots in dyed hair

That means the hair that grows will be the same color you had before you dyed your hair.

Why?

Because the color mix only has the power to change the color of the hair you use it on. Let’s put it another way: the permanent dye will change the color of the hair it touches.

So, how can you change the color of the hair that hasn’t grown yet?

That’s impossible. And it’s impossible because the way the permanent dye works on your hair.

You use permanent dye with developer and it contains ammonia. The developer opens your hair cuticles that protect your hair fiber and the ammonia makes the color stick.

The developer also lightens your hair color up to a level and a half.

And that color change is irreversible. But it’s irreversible only on the hair that it dyes.

Because when your hair starts to grow, you’ll notice that the roots are a different olor than your ends.

Why is the color at your roots different than the rest of your colored hair?

Because the new hair that grows is your natural color, the same color that your hair was before you dyed it.

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No dye can change your genes. The color your hair was before you dyed it is part of your genetics.

That’s why the color that grows will always be your natural color.

box hair dye garnier nutrisse

So, there are two things that you need to keep in mind:

Even if you use a permanent dye, the new hair that grows in will always be the same as your natural color.
Once you use the permanent dye, the dyed hair won’t go back to your natural color.

So, what happens if you use a permanent dye and you want to go back to your natural color?

Well, you have a few options.

Shave your head, which I think you wouldn’t want to do.
Cut your hair an inch or two a month. That way your new hair will grow in as your natural color and you’ll get rid of the dyed hair little by little.

And what color will your hair grow if you dye your hair with a permanent dye?

I’ll tell you about that soon.

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If you use a semi-permanent dye on your hair, the new hair will grow back your natural color

woman with blue hair and roots of her natural hair color

So, what’s the difference between semi-permanent and permanent dye?

The first difference is that it doesn’t contain ammonia and you don’t use it with developer, so it doesn’t modify your hair color.

And that brings us to the second difference: the semi-permanent dye fades as you wash it. So, after a few weeks, and depending on how often you wash it, your hair will go back to your natural color.

Let’s say your hair is a blonde 7 and you use a semi-permanent brown 4 dye on it. With each wash, the semi-permanent dye will fade and your natural blonde 7 will start appearing again.

When new hair starts to grow in, it will grow as your natural hair color, so the semi-permanent dye also doesn’t change your hair color as it grows.

It also won’t affect the color of the hair you use it on.