Cool Cobalt!IT would be unjust to pay homage to autumn's favourite primary without referencing the dressing down Meryl Streep gave Anne Hathaway in The Devil Wears Prada. It was a monologue that opened our lexicon to what laymen would have once called 'blue'."You go to your closet and you select that lumpy blue sweater, for instance, because you're trying to tell the world that you take yourself too seriously to care about what you put on your back. But what you don't know is that that sweater is not just blue, it's not turquoise, it's not lapis. It's actually cerulean. And you're also blithely unaware of the fact that in 2002, Oscar de la Renta did a collection of cerulean gowns. And then I think it was Yves Saint Laurent , who showed cerulean military jackets? And then cerulean quickly showed up in the collections of eight different designers." And so she went on. When the autumn shows rolled out in February, it was clear designers hadn't quite cast off thoughts of their upcoming summer holidays. An ocean of azure washed over the catwalks, making a bold statement for winter where elsewhere traditional autumnal hues of forest green, earthy burgundy and midnight navy dominated.