During the latter half of the last century, a number of cultural commentators confidently asserted that blue food and drink products would never succeed in the marketplace. How, then, to explain the recent rise of blue drinks in our stores and images of blue foods online? Blue foods are certainly rare in nature, rarer, at least, than foods of other colours. Perhaps as a result, this hue tends to be associated with notions of unnatural and artificial food colouring. That said, ‘natural’ blue f...