Maintain Your Shade: Medium Skin

The lighter you go, the more prone your hair is to brassiness, says New York City colourist Sharon Dorram. Lather up with John Frieda Sheer Blonde Colour Renew Shampoo (£4;, made with grapefruit extract to keep your tone intact. Also invest in a shower-head filter to remove mineral buildup, which can alter your colour - we love the Vitaclean HQ Vitamin C Filtered Shower Head (£60;

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