How Long Does Demi-Permanent Hair Color Last? [Ask The Experts]

Ah, demi-permanent hair dye. The longer lasting sister hair dye of semi-permanent that’s not quite as intense as permanent hair color.

You’re probably wondering how long this hair dye lasts before it starts to fade away and leave your hair looking drab. How long does demi-permanent hair color last?

The simple answer: Demi-permanent hair color will last around 10 to 16 washes. However, the longevity of this type of hair dye really depends on a few different factors such as:

  • The condition of your hair before coloring it
  • The type of demi-permanent hair color you use
  • How often you wash your hair
  • If you use any heat styling tools on your hair (and how often)

Let’s take a closer look at each of these factors so you can get a better idea of how long you can expect it to last, why you need to use it and some tips on how to make your color last.Let’s go!

What is demi-permanent hair color?

Demi-permanent hair color is a great way to add some pizzazz to your look without making a long-term commitment.

Unlike permanent dyes, which use large molecules that can change the structure of the hair, demi-permanent dyes are designed to be gentle and deposit color without damage. 

So how does it work? Demi-permanent is a type of hair dye that works by depositing color onto the hair shaft.

Unlike permanent hair dye, which penetrates the cortex, demi-permanent color sits on the outside of the hair shaft. This means that it doesn’t damage the hair like permanent dye can.

The result is usually softer and more natural-looking than permanent color.

It will eventually fade out over time, making it a great option for those who like to change up their look on a regular basis.

How does demi-permanent hair dye work?

Here’s a great video that tells you more about it, how it works and the differences between this and semi-permanent hair dye.

Which lasts longer semi-permanent or demi-permanent hair color?

Here’s a quick rundown of the difference between the two:

Semi-permanent color lasts around 3-4 weeks.

Demi-permanent color lasts up to 6 weeks.

When it comes to Semi-Permanent vs Demi-Permanent hair color, there are a few key differences to keep in mind.

First, semi-permanent color is typically gentler on the hair and doesn’t penetrate the hair shaft as deeply.

This means that semi-permanent color will generally fade out faster.

Additionally, demi-permanent hair dye can provide more consistent coverage for grays and resistant hairs, whereas semi-permanent color may require more frequent touch-ups.

Ultimately, how long your new hair color lasts will depend on a variety of factors, including the health of your hair, the type of color used, and how often you wash your hair.

So if you’re looking for a temporary change or a more low-maintenance option, semi-permanent hair color may be the way to go.

On the other hand, if you’re wanting a longer lasting result, demi-permanent may be a better choice.

Does demi-permanent color wash out completely?

This type of hair color is designed to gradually fade over time, so it will eventually wash out.

However, how long it takes for the color to fade will depend on several factors, including how often you shampoo your hair and what type of shampoo you use.

If you want the color to fade faster, you can try using a clarifying shampoo.

Additionally, keep in mind that this hair color can sometimes leave behind a slight stain, so if you’re looking for a completely natural look, this may not be the right choice for you.

Does demi-permanent color bleed?

Demi-permanent color does not bleed.

In fact, it’s one of the main reasons why people love it so much. The color molecules are bigger than those in permanent color, so they can’t penetrate the hair shaft as deeply.

But unlike semi-permanent color, it doesn’t sit on top of the hair like a coating or stain.

This means that you won’t get that telltale line of color along your hairline or on your pillowcase.

If you find the hair dye bleeds, it’s usually because it’s not fully saturated into the hair.

This can happen if you don’t follow the instructions on the box, or if you have particularly porous hair. 

But usually, as long as you follow the directions, you shouldn’t have any problems with bleeding.

Is demi-permanent hair color right for me?

– It doesn’t use harsh chemicals, making it gentler on the hair.

– It coats the hair shaft with pigment, meaning that it will eventually fade out over time.

– It’s a great way to add some pizzazz to your look without making a long-term commitment.

– It can provide more consistent coverage for gray hairs.

– It doesn’t bleed, making it less of a hassle to use.

How long does it take for demi-permanent hair color to come out?

This type of hair dye is mixed with a low-volume developer, which helps to deposit color while keeping the hair’s structure intact.

As a result, it can last anywhere from 4 to 6 weeks.

It won’t completely come out, however, it will eventually fade. So it will need to be touched up on a regular basis to keep your color looking fresh.

How long does demi-permanent hair dye last in weeks?

It can last anywhere from 4 to 6 weeks.

Does demi-permanent hair dye damage hair?

Demi-permanent hair dye does not contain ammonia or peroxide, so it cannot lighten the hair like a permanent hair color. Because it does not contain these harsh chemicals, it is often considered to be a safer alternative for coloring the hair.

There are several benefits to using this kind of hair dye, including the fact that it can add shine and depth to the hair, and it can also help to cover up some of the gray hairs.

BUT, like all hair dyes, it can damage your hair.

The fact is that the hair colors and chemicals used in hair dyes can strip away some of the natural oils from your hair, leaving it dry and brittle.

So really, all hair dyes damage your hair to some extent. What makes the difference is how well you take care of your hair before and after you dye it.

If you’re worried about damaging your hair, then you may want to consider using a semi-permanent hair color instead.

How often can you color your hair with demi-permanent hair dye?

The answer may surprise you: there’s no hard and fast rule.

Some people can color their hair every week without any problems, while others may need to take a break after a couple of months.

Ultimately, how often you can dye your hair depends on your individual hair type and how well you take care of your locks.

How can I make my demi-permanent hair color last longer?

In order to make your new color last as long as possible, there are a few things you can do.

First, be sure to use a color-safe shampoo and conditioner. This will help to protect the color from fading.

Second, avoid using hot tools too often. The heat can cause the color to fade more quickly. Use a heat protectant spray when you do.

Try not to wash your hair too often. Every time you wash your hair, some of the color will fade. So, if you want to keep your color looking fresh, it’s best to limit how often you wash your locks.

Finally, use a good deep conditioner once a week to replenish and nourish your hair and restore moisture back into your locks.

By following these simple tips, you can enjoy your fabulous new hair color for weeks to come!

Parting words

Demi-permanent hair dye is a great way to add some color to your look without making a long-term commitment.

It can provide more consistent coverage for gray hairs, and it doesn’t bleed, making it less of a hassle to use.

Just be sure to use a color-safe shampoo and conditioner to help protect the color from fading.

Good luck!


  • Nicola Freeman, Creative Director & Content Lead
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    With over two decades of passionate hair dyeing experience, I've experimented with nearly every shade imaginable. My journey began long before blogging; as an award-winning copywriter in London and New York, I shaped narratives for iconic brands. However, when friends sought advice during lockdown for at-home hair dyeing, I realized my true calling. Beyond being your hair color expert, I'm a mom of two girls, wife to artist Tony, and an avid soccer player!

  • Enza Piazza, Hair Stylist & Color Consultant
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    I’m Enza Piazza, your go-to hair stylist and color consultant with over 23 years of professional salon experience bringing vibrancy and life to hair of all hues. My Italian roots from sunny Sicily infuse passion into every snip and color, a passion that’s been recognized with top honor awards including bridal and party hair at the National Hairdressers Federation’s Championships. After training in Surrey, UK’s most prestigious salons including Head Master Academy, I embraced the entrepreneurial spirit and set up Enza Hair Styling, offering tailored hair care for 13 years, and treating each client like family. Away from the salon, I cherish moments as a proud Nonna to grandson Joseph and as a playful companion to my Jack Russell, Bo.