Another round of fabulous photos of Kate Middleton, Prince William, and their kids on their latest royal tour have arrived! As the Duchess and her family touched down in Germany for the second stage of their European trip, Kate gave us another masterclass in diplomatic dressing by opting for a bold blue shade, best described as Prussian blue.

The Duchess, 35, is known for paying subtle homage to the country she visits through her choice of outfit, be that through a motif or detail (remember that maple leaf brooch?), by opting for the work of a local designer (see the white evening dress by Gosia Baczynska worn earlier in the week) or through clever choice of colors.

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On Wednesday, July 19, she went for the latter approach with a distinctive coat dress by Catherine Walker — a brand that was also memorably favored by the late Princess Diana — in Prussian blue, a color that was originated in Berlin at the start of the 18th century. It was then adopted for the uniforms of the Prussian army and retained a symbolic importance, worn by German soldiers in military ceremonies until the outbreak of World War I.

kate middleton prince william getty images

Kate, William, George, and Charlotte arriving in Germany on July 19.
(Photo Credit: Getty Images)

As noted by The Telegraph, the color is also known as cornflower blue, which also holds significance — the cornflower is traditionally associated with Germany (and Prussia in particular) after Queen Louise hid her children in a field of cornflowers while fleeing Napoleon’s forces.

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Kate’s color choice was echoed in her children’s outfits, too. Prince George, 3, was dressed in a smart blue shirt with his trademark shorts, while Princess Charlotte, 2, wore a ruched summer dress in a lighter shade of cornflower blue.

When the Duke and Duchess of Cambridge touched down in Poland earlier this week for the first leg of their royal tour, attention naturally turned to their sartorial choices. Kate wore an elegant white dress by Alexander McQueen paired with a ruby necklace that matched Charlotte’s outfit. The adorable toddler wore a red and white printed dress with shiny red shoes and a red bow in her hair. William, 35, also followed the theme in a white shirt and red tie.

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While it is not unusual for the royal family to coordinate their outfits, this time there was a deeper meaning behind their distinct color theme. Royal fans noticed that the red and white theme was a subtle nod to the Polish flag, and a signal of gratitude to the country they were visiting. We can’t wait to see the rest of Kate, William, George, and Charlotte’s outfits during their trip!

This story originally appeared on Grazia Daily.

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