Not only has it seen a 30 percent increase in pins on Pinterest, but copper hair is also making an appearance everywhere in France. "Right now in the salon, we are really seeing clients wanting rich, warmer, and deeper colours," said Sonia Akkari, colourist at the Paris-based David Mallett salon. "After a little bit of a difficult December in Paris, with the sky being grey and the weather colder, I think they want to have a little bit of sunshine in their lives and their hair colour, so we are introducing warm copper tones for brunettes and golden tones for blondes. We are really moving away from cooler ashy colours this winter."