Kate Middleton Is in Shades of Grey for Commonwealth Day with Prince William and Prince Harry

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Forget Earl Grey. We’re all about Kate Middleton in fifty shades of grey.

The Duchess of Cambridge was making monochrome work as she stepped out win head-to-toe slate for the Commonwealth Day celebrations in London on Monday (Mar. 14, 2016). Joined by husband Prince William and brothe-in-law Prince Harry, the royal fashionista was seen wearing an embroidered coat by Erdem, a large smoke-colored hair by John Boyd, and a pair of Rupert Sanderson suede heels. She accessorized her look with a clutch by Emmy London.

Queen Elizabeth II and Prince Philip were also there at Westminster Abbey for a service in honor of the holiday, which celebrates the Commonwealth of Nations. Prince Charles and wife Camilla, Duchess of Cornwall, were not in attendance as they were in Croatia on a royal engagement.

Launch the gallery below for more royal sightings on Commonwealth Day!