Princess Kate has stuck to a muted wardrobe ever since the death of Katharine, Duchess of Kent.
GB News understands that King Charles instructed members of the Royal Family to wear darker colours in the days and weeks following the Duchess of Kent's death until her funeral takes place.
Today, the Princess of Wales honoured that request in a £1,370 checkered trouser suit from Bella Freud with a dark top.
Earlier this week, during a visit to the Women’s Institute with Prince William to mark the anniversary of Queen Elizabeth II’s death, Kate, 43, chose a black, grey and white tartan dress by Alessandra Rich.
Hidden meaning behind Kate's outfits as Princess of Wales following King's request
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At the Women’s Rugby World Cup 2025 over the weekend, she also wore an all-black ensemble featuring an Alexander McQueen blazer and Roland Mouret trousers.
Other senior royals are similarly observing the sombre dress code.
The Duchess of Edinburgh was photographed in black while carrying out engagements in Canada.
The King has approved a period of royal mourning that will continue until and include the day of the Duchess of Kent’s funeral on September 16.
Princess Kate wearing an all black suit at the Rugby World Cup
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During this time, members of the Royal Family will wear clothing that pays appropriate tribute.
Over the weekend, Queen Camilla accompanied King Charles to the annual Braemar Gathering Highland Games near Balmoral.
She surprised onlookers by opting for a blue dress and green beret but observed protocol with a black armband — a discreet symbol of mourning.
The Duchess of Kent died on Thursday, September 4, at the age of 92.
Princess Kate wearing an Alessandra Rich dress at the Women's Institute
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Buckingham Palace confirmed the news the following day.
In a statement, the Palace said: “It is with deep sorrow that Buckingham Palace announces the death of Her Royal Highness The Duchess of Kent.
“Her Royal Highness passed away peacefully last night at Kensington Palace, surrounded by her family.
“The King and Queen and all Members of The Royal Family join The Duke of Kent, his children and grandchildren in mourning their loss and remembering fondly The Duchess’s life-long devotion to all the organisations with which she was associated, her passion for music and her empathy for young people.”