Just leave it to the Duchess of Cambridge to pack a dress in her suitcase that not only comes in her power colour [1], but highlights her most treasured jewellery [2]. When the duchess stepped out with Prince William for the second day of their trip to Northern Ireland [3], she was hiding this Jenny Packham sheath underneath her fabulous Mulberry coat [4]. Kate's accessories — Rupert Sanderson navy heels, her engagement ring [5], and the matching earrings she tweaked from Princess Diana's collection [6] — should've been a clue as to the shade of the sophisticated piece she was wearing.

Once she shed her outerwear, we instantly noticed how the velvet strip on this design drew attention to the pristine sapphire stones in her ears and on that finger. It's pretty remarkable how perfect one outfit combination can be, don't you think? Of course, this reminds us of the blue Issa wrap dress [7] Kate wore for her engagement portraits. She's always game to spark a little nostalgia with her looks.