Is it bad to mix hair dyes?

We’ve all heard the horror stories of people mixing hair dyes and ending up looking like a cross between a clown and a skunk. But is it really that bad? In this article, we dive deep into the world of hair dye mixing to explore whether or not it’s something you should be doing.

The Basics of Hair Dye Mixing

First things first, let’s talk about what happens when you mix different types of hair dye together. Most commercially available hair dyes are formulated with specific colors and chemicals in mind. When you mix two different brands or shades together, they can react in unpredictable ways.

Some folks think that if they mix a cooler shade (like ash blonde) with a warmer shade (like golden blonde), they’ll get the perfect neutral tone. Unfortunately, this isn’t always the case. Mixing these two hues might cancel out some unwanted undertones like brassiness but can also lead to an uneven color overall.

Another thing to consider when mixing dyes is how long each product takes to process. If one dye requires 30 minutes on its own while another needs just 20 minutes + to avoid turning your locks green, blending them could create pigmentation chaos at best and damage beyond repair at least!

Pros and Cons of Hair Dye Mixing

So why do some people mix their own hair dyes? There are pros and cons, like everything else under the sun! Here are just a few:


  • Mixing your own custom shade: Sometimes you want something special – perhaps The Little Mermaid red – which doesn’t come as standard.
  • Saving money: You may have half-used tubes or bottles hanging around already that could still do some magic!
  • Experiment: Why use plain ‘ole natural-looking brown when powder blue is there for experimenting!?


  • Uneven coverage: As mentioned before with warm and cool shades and processing time, blending hair dyes can lead to an uneven look.
  • Compromised chemical structure: You know how that saying goes: “Too many cooks ruin the broth” – in this case, too many chemicals can break your hair. Different brands use different formulas and adding them together could cause structural damage to the integrity of your locks.
  • Allergic reaction: When you mix two or more types of dye, it’s possible for a chemical cross-reaction to occur causing scalp irritations or allergic reactions.

Understanding Hair Dye Types

To better understand if it is bad to mixing hair dyes let’s go over what types there are on the market:

Permanent dye:

The most long-lasting type as it fully penetrates each strand with color molecules – great for those seeking full coverage of greys!


This adds shine without any harsh regrowth line (!) plus fades away gradually rather than growing out like roots.


A happy medium between permanent and semi – longer lasting than the latter but without their staying power.

People will try anything these days, so even combining these 3 different categories sounds like a risky business indeed.

Tips for Hair Dye Mixing Success

If you’re set on mixing hair dyes, here are some tips to help you achieve success:

  1. Stick with one brand: To avoid compromising the structure by combing multiple chemicals sticking within just one brand is ideal.
  2. Small batches only! Keep it limited so less product goes wasted thus saving money!
  3. Test patch first before application!: Always do a test patch before applying all over our head because trial (or at least testing) makes perfection.
  4. Do not weaken solutions further via diluting; don’t add water under any circumstances (!! Introducing H20 = Less color intensity!!!!!!!!).

Remember though sometimes instructions weren’t written to be devilishly challenged by us!


To mix or not to mix, that is the question. Ultimately, it’s up to you and creativity. But if wanting something bespoke; e.g. for a particular cosplay or Halloween look then definitely experimenting can its benefits.

Just make sure you understand what goes into each product, do some research beforehand if unfamiliar with chemicals on involved so as not causing damage – unless looking like part The Joker is your intention 😉

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