She walks in the room, and you can tell she's in her late forties, maybe early fifties, but one thing is puzzling you; not a grey hair in sight, not even the odd stray strand. Wow, she looks amazing, but how does she do it? How is her grey hair coverage that natural?

With home colour by Garnier quite probably.

The most common question any hair colourist is asked is, "Can you get rid of my grey?" followed swiftly by, "And how will I keep it that way?" Some women can carry off grey hair; in fact, there's nothing more striking than a super-chic, perfectly coiffed shock of silver – Meryl Streep as Miranda Priestly in The Devil Wears Prada springs to mind – but for most of us, those first few grey hairs are a horror show.

Although, it's almost inevitable; whether it happens in your 20s, 30s or 40s, the appearance of grey hair is one of those facts of life, an irreversible sign of ageing that can make you look older than you feel as soon as you look in the mirror. But you don't have to put up with it (you really don't). More and more women are getting grey hair coverage using permanent hair dye at home and creating natural looks that better suit their stylish, youthful selves.

Why do we get grey hair?
Age, my dear, age. Your mother was right; it does come to us all eventually. Grey hair is hair that no longer contains any pigment and as your body slows with age, so does your melanin production. Melanin is the pigment – a complex polymer, to be precise – that gives your hair its colour. Almost everyone goes grey eventually, unless they go bald first, and the rate at which you go grey is genetic. So, don't cry in front of the mirror, blame your parents. Okay, we get the ageing bit, but how does a lady go about camouflaging it with some full grey hair coverage?

Use permanent colour at home
If you have only a few grey hairs, colouring at home is easy and economical, but bear in mind that grey hair is the hardest to cover, so you'll need a hair dye that is permanent.

Which shade do I choose?
Whenever you pick a hair dye consider your skin colour and your natural hair colour – not the grey bits, obviously! It's also worth bearing in mind your eye colour and the kind of clothes you wear, but a rule of thumb is to avoid a drastic change from your original natural shade; choose colours that are only a shade or two lighter or darker, so that when your roots grow through they will be less visible.

The best hair dye for grey hair if you have blonde hair
The great news is that your greys are very easy to cover as the colour is not too far removed from the grey. Think of Helen Mirren; is she grey or is she blonde? Who cares? She always looks amazing. Generally, natural blondes with a complexion of warm, pinky tones are best opting for a honey blonde colour, while those with cooler, yellowy skin tones are more suited to icy-blondes with blue undertones.

The best hair dye for grey hair if you're brunette
You won't be surprised to hear that you should be covering the grey with brown dye, but the best hair dye for grey hair here is a medium-light shade, even if you are naturally very dark, as this will complement your naturally paling skin.

Yes, that's right; skin ages too and it tends to become paler. So, whilst you can cover up grey hair with any colour, if you want it to look natural you do need to take your ageing complexion into consideration. As your skin becomes paler, a dark hair colour, or something dramatic like a fiery red, can look too harsh and might age you further, whereas a more forgiving shade with hints of chocolate, or light balayage highlights will keep your face illuminated and youthful looking for longer.

As for that paling skin, see it as a compensation – pale skin will always be chic.

4 Top Tips for Anyone going Grey
1. Think Positive
Grey can be gorgeous; living with grey – accepting it rather than denying it – requires a change in mindset. Learn to love what Mother Nature is doing to you and due to its different texture and lack of colour, grey hair can become a very attractive feature. If you add the right hair colour, your 'grey' hair will act as highlights, giving you a completely new look that will get you noticed for all the right reasons.

2. Dark to Light
Professional colourists usually recommend a darker shade for your roots and a lighter shade that matches your natural hair for the rest. Start by applying the darker dye to the roots (about an inch or so down) and then use the lighter shade for the rest of your hair.

3. Keep it Hydrated
Grey is one thing; wiry, brittle hair and split ends are another. Whenever you use hair colour, you have to work even harder to keep your hair looking vibrant and healthy. That means hydration, and nourishment; deep conditioning treatments are a must. A healthy, balanced diet and moderated lifestyle won't do your hair any harm either, and go easy on those heated styling tools too.

4. White is Hot
As mentioned above, some women look incredibly elegant with completely grey hair and are liberated by releasing the silver vixen inside of them. The full-on grey mane is a growing trend, so if you've got it, and you love it, why not embrace it? It still needs work though; you can't just let it run wild and free all the time. Regular use of an enhancing treatment, such as Garnier Perfect Silver Pearly White, will neutralise any undesirable yellow tones and illuminate the natural white or grey. It's also enriched with camellia oil to keep your hair soft and supple.