Or navy and black don't go? There's a few 'quiet' fashion rules that have stuck over the years – but Kate Middleton just proved fashion 'rules' are meant to be broken. The Prince and Princess of Wales attended the Wales vs England Six Nations match at the Principality Stadium in Cardiff,

There are a few fashion rules that pretty much everybody can recite verbatim. No white after Labor Day. Always match your belt with your bag. And, of course, never, ever mix navy and black. Although these rules may sometimes make sense,

It’s been a confusing few months for anyone obliged to write about Kate Middleton ’s wardrobe for a living. First, there was a not-quite announcement, through a source quoted in The Times, that the Palace would no longer be issuing details on the Princess of Wales’s outfits.