The yellow gown, with its wide purple belt, is reminiscent of the early days of Yves Saint Laurent, who was known for his color-blocking, clashing-colors designs.

To add even more color, Mrs. Trump wore a pair of large emerald and diamond earrings — jewels that could have easily been pulled from the Royal Jewelry Collection.

Our Breitbart London Editor, Oliver JJ Lane, noted to me that President Trump wore an impeccably tailored white tie suit (uncommon in America, but a custom at U.K. state dinners).

“Consisting of a cutaway tailcoat, white starched shirt with wing collar, white bow-tie and waistcoat in matching white fabric (silk or cotton to taste), and high-waisted black wool trousers with a double stripe up the side of the leg — contrasts with the traditionally less formal tuxedo, which has a ‘lounge’ type jacket, black bow tie, black waistcoat or cummerbund, and just one stripe up the trouser leg,” Lane told me of Mr. Trump’s suit.