How to Make Hair Colour Last Longer: The Colour-Treated Hair Care Routine

Reviewed by Les Erasmus, Balayage & Lived-in Colour Educator, Partners Hair V&A Waterfront · Updated September 2026

Salon colour looks perfect on the day. Whether it still looks good at week six is decided almost entirely by what happens at home — the shampoo, the water temperature, the sun, and a few habits most people never hear about. Most fade is preventable. This is the routine that prevents it.

Key takeaways

• The two biggest colour-killers are sulphate shampoo and hot water. Fix those first and everything else is a bonus.
• Wait 48 to 72 hours after colouring before the first wash.
• Wash two to three times a week, not daily. Every wash removes a little colour.
• South African UV breaks colour down year-round — a UV leave-in or a hat is part of the routine here, not an extra.
• Tone at home between visits: purple shampoo for blondes, blue for warm brunettes, a colour-depositing mask for reds.
• A weekly mask and heat protection every time keep colour glossy instead of dull.

Why colour fades

Colouring opens the cuticle to deposit or lift pigment, and it doesn't fully close again. That leaves hair more porous, and the colour molecules free to wash out a little at a time. Every wash lifts some; hot water and sulphate shampoos lift a lot. Sun oxidises what's left and shifts the tone — blondes go brassy, reds lose intensity, brunettes warm up. Chlorine and salt water strip faster still. Slowing colour fade is mostly about closing those doors one by one. For the chemistry in more depth, see why hair colour fades.

The first 72 hours

Colour is still stabilising for two to three days after the service. Washing in that window — especially in hot water — removes pigment that hasn't fully bonded. Wait 48 hours at minimum, 72 if you can, and avoid tight styles, chlorine, heavy sweating and heat tools in the meantime. If your colour "faded straight away", this is almost always why.

Switch to a colour-safe, sulphate-free shampoo

This is the single biggest change. Sulphates strip colour the way they strip oil — efficiently and without discrimination. A colour-safe, sulphate-free formula cleanses without pulling pigment out of the shaft, and clients who make the switch typically see colour holding weeks longer. Every professional brand has a colour range: Kérastase Chroma Absolu, Redken Color Extend, Pureology Hydrate, L'Oréal Professionnel Vitamino Color. Match it to your colour type — purple-toning for blondes, blue-toning for warm brunettes, moisturising colour-safe for everything else. Browse the colour-treated hair range.

Wash less, and finish cool

Two to three washes a week is the target. Stretching from three to two makes a measurable difference on its own; dry shampoo keeps roots fresh on the days between. Water temperature matters as much as frequency: hot water opens the cuticle and lets colour escape, cool water closes it. Thirty seconds of cool water at the end of every wash locks colour in and adds shine. It's the cheapest habit in this guide.

Protect it from the sun

UV doesn't just lighten hair. It chemically breaks colour down, shifts warm tones warmer and lifts blonde toward brass. South African sun is strong enough that this happens year-round, not only on beach days. A UV-protective leave-in spray belongs in the routine for every colour client; a hat is the most effective protection when you're outdoors for long. If you swim, wet the hair with clean water first, apply a leave-in, and rinse straight afterwards — a chelating shampoo after pool days removes chlorine before it can shift the tone.

Tone at home between visits

Colour drifts between appointments, and toning products keep the tone you paid for without a full service. Blondes: purple shampoo for yellow brass, once or twice a week. Darker blondes and brunettes: blue shampoo for orange. Reds, which fade fastest of any colour: a colour-depositing mask in a matching shade refreshes the pigment in one step. None of these replaces a salon toner — they stretch the time between them.

If your colour is lived-in or balayage

Lived-in colour is designed to soften as it grows. That's the point of it — the blend gets gentler rather than showing a line, so "fade" isn't the enemy it is with a solid colour. The routine changes in two ways. Toning matters more than depositing, because the lightened pieces are what drift; a gentle blonde formula, used sparingly, keeps them clean without over-cooling the base. And condition matters more than anything, because those pieces have been lightened and are the most porous hair on your head. Judge lived-in colour at week eight, not day one — if it's soft, glossy and the tone is clean, it's doing exactly what it should.

Weekly mask, and heat protection every time

Coloured hair is more porous than untouched hair, so it loses moisture faster and goes dull sooner. Conditioner is maintenance; a mask is treatment. A weekly five-minute mask is the difference between colour that still photographs well at six weeks and colour that looks spent at three. For lightened hair — highlights, balayage, bleach — add a bond builder such as Olaplex No.3 or Redken Acidic Bonding Concentrate to repair the structure the lightening process affected.

Heat protection is non-negotiable on coloured hair. Hot tools open the cuticle and accelerate both fade and moisture loss. Apply protectant to damp hair before blow-drying, and keep straighteners and tongs between 150 and 180 degrees on fine or colour-treated hair. Lower heat, longer colour.

Refresh with a gloss or toner

When colour looks dull but roots aren't showing much, a gloss or toning service brings back shine and tone without a full re-colour. It's gentler, cheaper, and usually all a well-maintained colour needs to look freshly done. Glosses last four to six weeks — see toner vs gloss for which one you need.

Frequently asked questions

How long should salon colour last?

With good care: permanent colour holds vibrancy for four to six weeks and roots need attention at six to eight. Highlights and balayage go eight to twelve weeks. Semi-permanent four to six. Fashion colours three to four. If yours is going faster, shampoo and washing frequency are the first two things to check.

How long after colouring should I wait to wash?

48 hours minimum, 72 is better. Your colourist will tell you if your service needs longer.

Do I really need colour-safe shampoo?

Yes. It's the biggest single factor in fade. Regular and clarifying shampoos strip colour far faster than a colour-safe, sulphate-free formula.

Why does my colour fade so fast in South Africa?

Usually several things at once: frequent washing, hot water, sulphate shampoo, heat styling without protection, and strong UV. Each one you fix adds weeks.

Does swimming fade colour?

Significantly. Chlorine strips colour and can shift blondes green. Saturate hair with clean water before you get in, apply a leave-in, rinse immediately after, and use a chelating shampoo on swim days.

Is colour-depositing shampoo the same as a toner?

No. Depositing shampoos and masks add a little pigment each wash to hold tone at home. A salon toner resets tone more precisely and lasts longer. Use both — home for maintenance, salon for the reset.

Which range is best for colour-treated hair?

Kérastase Chroma Absolu, Pureology Hydrate and Redken Color Extend are all excellent. The right one depends on your hair type, colour and condition — ask a stylist if you're unsure.

This guide is part of our complete hair colour care guide. Related: why hair colour fades, keeping red from fading, blonde hair care and grey hair care. For a colour consultation, find your nearest salon.