His old man's a champion of Harris tweed, waxed jackets and the kind of classic double-breasted suit that marks him out as the quintessential British style icon. But Prince William, to put it politely, is yet to find his style groove... or so we thought. 

Here he is outside the Sydney Opera House, following a reception welcoming him and wife Kate to Australia this week, wearing a simple, single-button suit in a knockout shade of royal blue. Proof that Wills is starting to hone his sartorial chops, this colour shows there's no harm in branching out from a traditional navy number and trialling something with a bit more punch to it.

Keen to give this most regal of shades a whirl? Click here for the best of royal blue.