JUSTIN’S COLOUR CODE

Want to know the secret to Jennifer Aniston’s hair colour? ‘A lot of contrast because that’s when the blonde really pops,’ says Justin. ‘I keep the depth to it – all the dark underneath – so that when the blonde lays on top it looks brighter. That’s because there’s so much dimension to the hair. The mistake people make is that they say they want to go blonde and then they get a whole head of solid blonde. The key is the contrast.’

If you like the Gwyneth Paltrow blonde it’s all about ‘a ton of very small, baby highlights that look really natural’, says Justin. This is also a great route to go if you have some grey hair. ‘Just work your highlights around the grey and it acts like another dimension of blonde,’ he says.

‘I think blondes are really lucky when they get some grey. I don’t think you should fight it and start to try to cover it. If you do that it just becomes a nightmare chore and a big monthly maintenance process. So try to work any grey into your colour if you can,’ is Justin’s advice.

‘The most beautiful brunettes are the ones who have scattered highlights, like the supermodel Gisele used to have,’ says Justin. ‘This gives dimension to the hair which also makes it look thicker, so I like to see ribbons of blonde going through a brunette.’

This colouring trick also helps if you have very fine hair. Adding in some blonde helps to ‘mess up the texture a little bit so it feel thicker but the added dimension will also give the appearance that you have more hair,’ says Justin. So it’s an optical illusion combined with a physical boost.