In July 2013, after giving birth to Prince George, Kate appeared outside St Mary's Hospital in a periwinkle-blue polka-dot sundress. Kate Middleton with Prince William and Prince George in 2013.

To shop the trend, pick a classic-cut dress like this high-neck periwinkle number from Topshop ($90; topshop.com). Pair it with neutral accessories and a neat updo for a duchess-inspired look.

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The then-Duchess of Cambridge wore a periwinkle blue Alexander McQueen coat dress to the Order of the Garter in 2022 After a two-year hiatus due to the pandemic, Garter Day returned in 2022.

At the October 2015 premiere of Spectre, Kate undeniably stunned in a sheer, braless periwinkle blue long-sleeved gown. Meghan Markle’s Braless Photos Are Royal: See Her No-Bra Outfits ...

Kate also wore an ivory silk crepe dress and cape from Alexander McQueen that ... First Lady Jill Biden wore periwinkle blue Ralph Lauren skirt suit accessorized with a coordinating hair bow ...

A vision in blue, Kate's unforgettable Ellie Saab moment at Royal Ascot in 2019 will go down in history as one of the Princess of Wales' most memorable looks. Pairing her periwinkle blue dress, ...

To celebrate Princess Charlotte's eighth birthday in 2023, Kensington Palace released a sweet new photograph of her wearing a white dress dotted withn blue periwinkle flowers.

Princess Kate's White-and-Blue Dress in New Video Contained Meaningful Messages. A frock to match her newfound appreciation for life.

On Princess Charlotte's 9th birthday, an image was released of the heir dressed in a white dress dotted with purple/blue periwinkle flowers. And Prince George posed at Windsor in a navy-and-white ...

Kate also wore an ivory silk crepe dress and cape from Alexander McQueen that ... First Lady Jill Biden wore periwinkle blue Ralph Lauren skirt suit accessorized with a coordinating hair bow ...