Holiday photo dumps are awash with aquamarine dresses, bikini sets and silky co-ords that look even brighter against golden hour light. If there was ever a colour designed for Aperol spritzes by the sea and sunset dinners on holiday, this is it. It was futuristic, and exactly the kind of styling that makes the colour feel far cooler than your average pastel. It looks fresh with white, expensive with silver accessories and, unexpectedly, yellow looks great if you're feeling brave enough to mix two bright colours. But if my Instagram feed is anything to go by, aquamarine is shaping up to be the colour that'll define the rest of summer.