Grey hair is a rite of passage — but covering it well is a craft. If you want results that look natural, last properly, and don't dry the hair out, two professional ranges sit at the top of every colourist's bench: L'Oréal Professionnel Majirel and Wella Professionals Koleston Perfect. Both deliver salon-grade grey coverage. They get there very differently.
Here's an honest, side-by-side breakdown so you can pick the right one for your hair, your goals, and your routine.
Why grey hair is harder to colour
Grey hair isn't simply "white hair." It's hair that has lost melanin, leaving a coarser, more resistant cuticle. That resistance is what causes patchy results, fade-out within a few washes, and that telltale brassy band at the hairline. Proper grey coverage needs three things working together:
- High pigment load — enough dye molecules to fully replace what's missing.
- Cuticle penetration — the right developer and processing time to actually deposit colour.
- Tonal balance — a base shade with the correct natural-series support to avoid translucent, ashy results.
Both Majirel and Koleston Perfect are engineered for exactly this. The differences are in how.
L'Oréal Majirel: the grey coverage workhorse
Majirel has been the colourist's safety net for decades, and for good reason. It's built around L'Oréal's Ionène G + Incell technology, which conditions the hair shaft while depositing colour. The result is a soft, glossy finish that doesn't feel "painted on."
Strengths
- Up to 100% grey coverage when you use a natural base (the .0 or NN series) mixed with your fashion shade.
- Forgiving on the hair — gentler feel, less dryness, ideal for fragile or previously coloured hair.
- Wide shade library with dedicated cool, warm, mahogany, and gold reflects.
- Predictable lift of 1–3 levels with the right developer.
Watch-outs
- On very resistant white hair, you'll want to add 50% of the natural base to your target shade.
- Vibrancy on darker bases is excellent; very high lifts are better handled by a dedicated high-lift line.
Browse the full L'Oréal Majirel collection for shades, mix tones, and developers.
Wella Koleston Perfect: the precision tool
Koleston Perfect is Wella's flagship permanent colour and a staple in high-end salons. Its ME+ molecule was reformulated for lower allergy risk while keeping the brand's hallmark colour fidelity. Where Majirel is the workhorse, Koleston is the scalpel.
Strengths
- Pure Naturals (/0) and Deep Browns (/7) series — purpose-built for stubborn grey, with intense pigment for resistant hair.
- True-to-tone results, particularly in cool ash, beige, and intense reds.
- Up to 5 levels of lift on certain Special Blonde shades — useful when you're going lighter and covering grey at the same time.
- Crisp, vivid finish that holds its tone well between appointments.
Watch-outs
- The high pigment load means you absolutely must follow Wella's mixing ratios — eyeballing it leads to overly dark results.
- Slightly drier hand-feel than Majirel, so pair it with a good post-colour conditioner.
Explore the Wella Koleston Perfect collection for the full shade chart and technical mixers.
Head-to-head: which wins?
It depends on what you're trying to do.
Choose Majirel if…
- You want a natural, softly blended look rather than block colour.
- Your hair is dry, processed, or fragile.
- You're covering up to 50% grey and want a forgiving formula.
- You prefer warm, glossy reflects — caramels, mahoganies, golden browns.
Choose Koleston Perfect if…
- You're covering 70%+ resistant grey, especially around the hairline and temples.
- You want sharp, true tones — proper ash, true beige, deep cool brown.
- You're lifting and covering grey in one step.
- You're confident with mixing ratios and developer choice.
Mixing tips that make either brand shine
- Always include a natural base for stubborn grey. Roughly 50/50 with your fashion tone is the colourist's standard rule.
- Use 20 vol (6%) developer for full grey coverage at level. 30 vol if you're lifting.
- Process the full time — 35 minutes for permanent colour, no shortcuts. Grey hair needs every minute.
- Apply to roots first on regrowth, then refresh mid-lengths in the last 5–10 minutes.
- Pre-soften very wiry, glassy white hair with a dab of developer for 5 minutes before mixing in colour.
Aftercare: protect the investment
Grey-covered hair is colour-treated hair. Treat it accordingly:
- Sulphate-free shampoo to prevent fade.
- Weekly bond-builder or protein-light mask.
- UV and heat protection — both fade permanent colour fast.
- Refresh every 4–6 weeks at the roots; full lengths only as needed.
The verdict
If we had to call it: Majirel for everyday grey coverage with a luxurious finish; Koleston Perfect for resistant grey, technical work, and precise tonal results. Most professional kits hold both — and once you understand each one's personality, you'll know exactly which to reach for.
Stocking up? Browse the full Hair Colour collection at Beauty Hair for professional shades, developers, mixers, and tools — all at trade-friendly prices.