Blonde to Brunette: What Actually Happens in the Chair

Blonde to brunette is the colour change people research least and regret most. It sounds like the simple direction, so it gets booked casually. Then it fades to orange in a fortnight or it goes so flat that the person in the mirror looks like a stranger.

Neither of those is inevitable. Both come from the same thing: treating it as one step when it is three. This sits under the wider going brunette guide.

Why your hair will not just take the colour

When hair is lightened, pigment is removed in a sequence. The cool tones go first and the warm ones go last, which is why lifted hair sits somewhere on a scale from yellow to orange before it is toned. What is left behind is a strand with gaps in it.

Putting a dark brown straight onto that is like painting a wall that has holes in it. It covers on the day. Then the colour sinks into the gaps and washes out of them, unevenly, and you are left with the warm base showing through.

What filling actually is

A filler puts the missing warm pigment back before the target colour goes on. If you want a level six brown, the hair first needs the orange and gold that a level six naturally contains and yours no longer has. It looks alarming in the chair. Clients regularly watch their hair turn a shade of copper and quietly panic.

Then the target colour goes over the top and it lands where it should, and it stays. The fill is not an upsell, it is the structural step, and a brunette appointment that skips it is the reason most people's dark colour fails.

The appointment, step by step

1. Consultation and historyWhat has been on your hair, how long ago, and how light it currently is. Bring honesty about box dye. It changes everything.
2. Test where neededOn heavily lifted or damaged hair, a strand test is worth the extra twenty minutes.
3. FillWarm pigment replaced through the lengths and ends, usually heavier on the most porous sections.
4. Target colourThe brunette itself, placed with depth variation rather than as a flat coat.
5. Treatment and finishThe cuticle is closed down over the pigment, and you get the wash routine that keeps it in.

Realistically this is a long appointment, and it is priced as the colour service it is. Starting points are on the service menu.

The copper stage is the part nobody photographs and the part that decides whether you still like your hair in three weeks.

SEB DID THIS HAIR, Stepney

Four questions to answer before you book

• Do you want to be dark, or do you want to stop maintaining blonde? They lead to different appointments.
• Is there any chance you will want blonde again within a year? Say so. It changes whether the lengths keep any lift.
• How hot do you wash your hair? Hot water is the fastest route to a faded brunette.
• Have you ever used box dye or a home gloss? It sits in the hair differently and it affects the fill.

The first three weeks

Expect some drop. Even a well filled brunette settles slightly as the excess pigment rinses. That is normal and it is why the colour is often mixed a touch deeper than the target.

What is not normal is going visibly orange or patchy. If that happens, book back in rather than reaching for a box. A gloss appointment will correct tone without another full colour, and it is a short appointment.

Give it a fortnight before you judge it

Dark colour looks its most intense on day one and most people see themselves in the mirror that evening and feel like a stranger. That reaction is normal and it is not a reliable signal. Give it two weeks. The colour settles, a small amount of the excess rinses away, and your eye adjusts to your own face with a different frame around it. Most people who ring the following morning are perfectly happy by the second weekend.