How to dye your blue hair brown without damaging it (in only 4 steps)

semipermanent hair dye

  • To dye your blue hair brown, the only thing you need to do is use a dye, either permanent or semi-permanent. That is, you don’t need to bleach your hair beforehand.
  • But it is a good idea for you to wait until you would have normally re-dyed your hair so that fewer blue pigments are remaining in it.
  • Now, to achieve a uniform and even brown, it’s important to keep in mind what blue tone you have right now.
  • If it’s a very dark blue, it’s best if you use a brown 4. If it is a light blue, you can use a brown 6. If it’s a tone in the middle, brown 5 will cover it perfectly.


As you can see, leaving behind that fantasy tone isn’t complicated, but you should choose the right kind of dye and tone.

The reason is simple. The darker the blue in your hair,  the darker brown you’ll have to use to cover it completely and for it to be even. 


It doesn’t matter how you dyed your hair blue in the first place. You should always use one of these two options:

  • Permanent brown dye
  • Semi-permanent brown dye


 Brown colors are dark tones and they cover any blue that is left over in your hair. 

But even though going from blue to brown is simple, there are some things you need to know before doing it. Want to know what they are?


Don’t go anywhere, because I’ll tell you:

  • What kind of brown dye and tone to choose to cover the blue
  • When is the best moment to dye your hair brown
  • How to apply brown dye, so the end result is perfect


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What type of brown dye and tone should you choose to cover blue

step by step

Before telling you about the two types of dyes you should use, let me recommend you something.

To banish blue with brown, as I mentioned before, it’s best if you wait for the moment you were going to renew your hair color.

Because this way, you can be sure you have washed out as much blue pigment as possible. That way, accumulated pigments won’t make the change more difficult.


 Even if blue isn’t a persistent tone like red or orange, it can always leave traces. This is why you need to wait until you were going to renew your color, and the blue doesn’t look like it did when you first dyed it. 


And another thing YOU SHOULD NOT DO is bleach your hair. Bleaching is unnecessary in this case since blue dye – just like blue toner – doesn’t last long. Generally, only four to seven washes.

So why expose your hair to an aggressive chemical process like bleaching? It would be better if you waited a few more days rather than bleaching, as it will damage your hair.


Now, do you want to know what kind of brown dye to apply? What tone of brown should you apply according to the blue color in your hair?


What kind of dye to apply to your hair, permanent or semi-permanent?

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If you’re thinking about changing to more conventional hair tones, you have two options:

  • Permanent brown dye
  • Semi-permanent brown dye

Even if these two dyes have the same function, they have a few basic differences.


Permanent dye

This is applied with 20 volume peroxide and contains ammonia. This makes the hair absorb more pigmentation, and it lasts 3 to 6 weeks.


Semi-permanent dye

This is applied with 9 or 10 volume peroxide and does not contain ammonia, which causes it to last less time in the hair, about four weeks.


 Either of these dyes will cover your blue hair perfectly. The type you choose will depend on your lifestyle and your haircare routine. 


  • For example, if you’re very strict about your beauty routine, semi-permanent dye is ideal for you because it does not contain ammonia, and it will not bother you to renew your color more often.
  • Now, if you’re the kind of person who easily forgets to do things, and you don’t have consistency or patience, it’s better if you use permanent dye. That way, you won’t have to renew it so frequently.


What tone of brown to choose according to the blue tone of your hair

As I mentioned earlier, it doesn’t matter how you have dyed your hair before. Whether blue dye or toner, brown will cover it perfectly, no matter if the dye is permanent or semi-permanent.

But a midnight blue is not the same as electric blue.

So you need to see which brown tone is best for your situation.


My years of experience have taught me the following. Don’t forget, only start this process after you have let the blue fade from your hair.

  • If your hair is a dark blue, also known as midnight, deep, or navy blue, you should use a dark brown 4 tone.
  • If your hair is a middle tone of blue like ocean or marine blue, you should apply a medium brown 5 tone.
  • If your hair is a light blue, such as baby, sky, or ice blue, you should use a light brown 6 tone.


If your hair is one of the dark blue tones, I advise you to apply a permanent dye the first time. This is because permanent dyes have a lot of pigmentation, and with the help of ammonia, will eliminate any traces of blue.

After that, you can re-dye it with a semi-permanent dye. Now, the time has arrived for the final decision: apply brown dye and abandon the blue for good…at least for now.


How to apply brown dye step-by-step

Once your blue dye has faded, the time has arrived to change your color. You should buy a brown dye kit, permanent or semi-permanent in the hair salon or pharmacy, of the color you chose.


Step 1: Prepare your hair

You should always have dry hair because permanent or semi-permanent dyes, as opposed to fantasy dyes or toner, are always applied to dry hair.


Brush your hair to make sure that there are no kinks that will get in the way of applying the dye.


Step 2: Preparing the mix

Everything you need will be included in the kit, so you just need to mix the peroxide with the bottle of dye until everything is homogenous.


Step 3: Applying the mix

With gloves on, start to carefully apply the mix from the root to the tips, taking extra care to ensure that no part of the hair goes uncovered.

 I recommend that you rub it with your fingers as if it were shampoo so that the mix penetrates your hair fiber well. 

Once you have finished applying it, you should allow it to sit in your hair for 30 to 45 minutes.


Step 4: Rinse and dry

Rinse your hair until the water runs clear. I recommend that you don’t use shampoo so you don’t strip the pigments from the hair dye.

What you can do is apply a conditioner so rehydrate your hair.

Whether permanent or semi-permanent dye, the way you apply it is always the same.



As you can see, the change from blue to brown is not a complicated process.

  • If you have chosen a semi-permanent dye, remember that you must touch up your roots every two or three weeks to keep everything looking neat.
  • If you applied a permanent dye, you should do this every 4 or 5 weeks.

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