12 Things to Know Before Dyeing Your Own Hair

DIY hair dyes can be tricky, so we enlisted the help of celebrity hair colourists Sharon Dorram and Kelly Van Gogh so you can get a salon-perfect hue at home. Click through our gallery to see the eleven tips you need to know before heading to the high street to pick up a shade. Here's to perfect at-home hair colour today, tomorrow, and forever!

"Your natural hair colour first determines where to start when you're choosing your desired shade," says celebrity colourist Sharon Dorram, who has worked with Julia Roberts, Kate Hudson, and Nicole Kidman. People with warmer base tones, like Emma Stone, who is a natural blonde, can take on different colours than someone with a cooler starting hue. Ask your hairstylist, who will be more attuned to identifying nuanced tones.

Rome wasn't built in a day-and drastic hair colour can't be achieved overnight, either. "The more pronounced the change you attempt, the more likely the results will be brassy, ashy or just plain disappointing," says celebrity colourist Kelly Van Gogh. A subtle shift, on the other hand, like Camilla Belle's lift from rich brunette to spicy cinnamon, is completely attainable.

If you plan on making a dramatic change, that is, more than three shades lighter or darker than what's natural, Dorram advises trying on a wig close to your desired colour. It's a quick, painless way to determine if the shade is right for you. Here, Amanda Seyfried dons a red bob on the set of her film, Now (and we think the colour is quite becoming!).

"Depending on the length and thickness of your hair, you should always buy a few boxes of dye," Dorram advises. Someone with below-the-chest strands, like Miley Cyrus, may require three boxes to get full coverage. "It's better to have too much hair dye, than to realise you need more halfway through," she says.

Foam dyes like John Frieda's Precision Foam Colour (left) are best for women with sensitive skin, since the mousse-like formulas won't drip onto the face or hairline. According to cosmetics chemist Ni'Kita Wilson, women with thick or curly hair will have better luck with gel or liquid formulas, like Kelly Van Gogh's Master Blend (center) and the L'Oreal Excellence Creme (right), which provide full coverage and distribute efficiently throughout the hair.

John Frieda Precision Foam Colour, £10; superdrug.com.
Kelly Van Gogh Master Blend, $39; trykellyvangogh.com.
L'Oreal Excellence Creme, £7; superdrug.com.

Chlorine strips away the hair cuticle, allowing minerals in the water to get into the hair shaft and alter your colour. Rather than diving in, sit pretty poolside, like Whitney Port, for at least two weeks before and after dyeing your hair.

Take it from Rihanna's colourist Ursula Stephens, who knows a thing or two about fine-tuning tresses: Hair dye always comes out darker than the image on the box. "Buy one or two shades lighter than your desired colour," she advises. "It is easier to amp up a colour's intensity than it is to tone it down."

"The scalp's natural oils work as a buffer to prevent irritation," says colourist James Corbett of the James Corbett Studio in New York City. Translation? Dirty hair is ideal for dyeing. "It's also much easier to section second day hair, which ensures even colour distribution." He suggests skipping the shampoo a day before you plan to colour-and we suggest sporting a cute baseball hat like Minka Kelly's to sweep back unwashed strands.

Certain shampoos, like clarifying or dandruff-fighting formulas, can strip away hair color with sulfates and harsh chemicals. Get a color preserving shampoo, which is more gentle. We like the Joico K-Pak Color Therapy shampoo and conditioner (£14 each; lookfantastic.com), which forms a lightweight, protective shield over the hair shaft-and smells great.

 

Hair always gets a little damaged when applying colour, even if you're going back to your natural hue. Both permanent and semi-permanent dyes contain hydrogen peroxide, which chemically changes the colour of the hair pigment. Celebrity colourist Tracey Cunningham recommends using the Redken Real Control Intense Renewal Mask (£16; lookfantastic.com) at least once a week to moisturise dry hair and restore shine. The mask aids in repairing damaged hair and fortifying strands so they resist further breakage.

Redken Intense Renewal Mask, $15; ulta.com.

Most brands list a 1-800 number on the box that will connect you to a real life hair colour expert. However, most of these hotlines close at 7 PM EST on weekdays, and are closed on weekends. Dye during business hours. That way, help is only a phone call away.