It claims to be the ultimate indulgence for the Instagram age, offering the traditional sweet hit of chocolate combined with the rush of a foodstuff that “pops” on camera and matching the colour of lurid yoga leggings.Pink chocolate, which could hit UK supermarket shelves in six months, has been developed by Barry Callebaut, the world’s largest cocoa processor. It is claimed to be the first new natural colour for chocolate since Nestlé unveiled white chocolate more than 80 years ago.