For many women, hair colour matters as much as length and volume. So it's no surprise that clients regularly ask me: "Can I still go for colour appointments with extensions?", "What happens if I want to go darker in autumn?" or "Can the strands just be bleached along with my hair?" The short answer: a lot is possible, some things are risky, and the order matters. In this article I'll explain what you can do colour-wise with keratin bonds – and what I'd advise against.
The basic principle: extensions are "dead" hair
Your natural hair is constantly supplied with moisture and oils from the scalp. Extensions get none of that. On top of that, most extension hair has already been processed – almost all light shades have been lightened beforehand. Every further chemical treatment hits hair that can't regenerate. So the rule is: colour as gently as possible, and always in professional hands.
The right order: colour first, then extensions
If you want to change your colour before getting extensions, there's a simple rule: colour your natural hair about a week before the appointment. That way we can choose and blend the extensions to match the fresh colour. Doing it the other way round – extensions first, then changing the whole colour – is far more complicated and riskier, because natural hair and extensions react differently to dye. For more on preparation, read our article on your first appointment.
Root touch-ups: yes, carefully
Touching up your roots is perfectly possible with keratin bonds – in fact it's our clients' most common colour appointment. What matters:
- Apply colour only to the regrowth, not to the bonds themselves. Dye and developer can soften the keratin.
- No long processing with heat right at the bonds (under a climazone, for example).
- Rinse thoroughly but gently – no vigorous rubbing at the roots.
- Ideal timing: during maintenance. With the bonds removed, the roots can be coloured with no risk, and then we reapply the strands.
If you go to another colourist, please make sure to tell them beforehand that you're wearing keratin bonds.
Toning and glossing: the gentlest option
If your extensions have picked up a yellow tinge over time, or you'd like to adjust the shade slightly, an acidic toner or gloss is the best choice. These products work with little or no developer, barely open the cuticle and add shine on top. For blonde extensions in particular, a gloss every few months is a lovely treatment.
Going darker: usually fine
Quality human hair can usually be dyed darker without trouble – say, if you want to switch from honey blonde to a warm brown in autumn. Important: light, pre-lightened hair is porous and absorbs colour very quickly and sometimes unevenly. A professional will colour a test strand first and may pre-pigment so you don't end up with a greenish or grey cast.
Going lighter or bleaching: I advise against it
Bleaching extensions is the riskiest thing you can do to them. The hair has usually already been lightened; bleaching it again makes it straw-like, brittle and prone to matting – and can loosen the bonds. If you want to go lighter, there are two better routes:
- New extensions in your target shade – at your next maintenance we swap the strands or add lighter ones.
- Blend in lighter strands – for a highlight effect, we place some strands in a lighter tone between the existing ones.
Balayage, ombré and highlights
These looks work beautifully with extensions – but best achieved by blending rather than dyeing. We combine strands in two or three different shades or use multi-tonal strands. That gives you a soft gradient without stressing the extensions chemically. Many clients have their natural hair lightened with balayage beforehand, and we match the extensions to it.
Common colour mistakes – and how to avoid them
- "I'll just touch up at home." Box dye on bonds and extensions is the most common problem. The result: soft bonds and patchy lengths.
- The colour matches under salon lights but not outside. Always check colour in daylight.
- One shade for everything. Natural hair has many tones. A blend of two or three almost always looks more natural.
- Brassiness from sun and hard water. A purple shampoo once a week or a gloss in the salon fixes this easily. More tips in our aftercare guide.
Common questions
Can I get extensions straight after colouring?
Better to leave a few days in between. Freshly coloured hair may still have residue, and the shade "settles" a little over the first few washes. About a week's gap is ideal.
Do extensions change colour over time?
Slightly, yes – from sun, chlorine, salt water and heat styling. Light shades tend to turn more yellow, dark shades a little redder. UV and heat protection slow this down considerably.
Can I get a perm with extensions?
I'd advise against it. You'll get curls far more gently with a curling iron or heatless methods.
Our takeaway
Extensions don't mean giving up on colour changes – but the strategy is different from natural hair. Root touch-ups and toning are no problem, going darker is usually possible, bleaching is best avoided. And big colour changes are best planned together around a maintenance appointment. That way your hair stays healthy and the colour looks as natural as it should.