Why is everyone still talking about this cerulean blue jumper?

the Guardian -

the Guardian—The idea that trends that trickle down from the catwalk has become one of fashion’s most enduring truisms. But does it hold water? The Devil Wears Prada, by Lauren Weisberger, was published in 2003, and the film version was released three years later, yet one line continues to resonate. Or rather, one concise theory involving a blue jumper that claims to illustrate the structural and economic connection between high fashion and the everyday, referred to in popular culture as the “cerulean blue”...

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