When the duchess of Cambridge arrived to celebrate the Fostering Excellence Awards in London on Tuesday, she was a standout in a modest albeit brilliant blue Saloni dress ($789). The lovely look was on par with Kate's classic taste and her penchant for blue, but it dawned on us just how perfect this formula is for our own agenda as we coast toward the holidays. While Kate Middleton left the sparkle at home, her dress was nonetheless brilliant, thanks to its stellar blue hue. And, if you've ever feared combining black and blue, the duchess will show you just how that's done too - adding black pumps, an understated clutch, and a slim belt to cinch the whole look together. Sure, red and gold may be hyped as the holidays' best hues, but this look may just convince you to give the blues a try, too. Keep reading to see how Kate styled her latest, then shop it for yourself right here.