First things first, let's start with the colours Kate absolutely adores, which suit her so well.
Two of her favourite picks are blue and green, and this is reflected in her wardrobe.
Green
Time for tennis, 2023
A tennis-inspired outfit for a trip to Wimbledon.
Courtside, 2023
She opted for a lighter hue for this tweed outfit.
Suit smart, 2023
The Princess once again matched outfit to theme when she wore this stylish green suit for a visit to learn more about the textile industry's sustainable practices.
Blue
Red carpet chic, 2015
Prince William's wife also favours blue, from her sapphire engagement ring to the eye-catching dress she wore to the premiere of Spectre at the Royal Albert Hall.
Royal blue, 2023
She wore this striking blue coat and matching fascinator to attend the Christmas morning church service with little Prince Louis.
Blues and greens have proven to be excellent colours for the Princess of Wales, but what about the times she hasn't played it safe?
Keep scrolling to see the colours she doesn't wear that often, but when she does, she certainly rocks them.
Yellow
A notoriously difficult colour to wear, Princess Kate has worn yellow on a few occasions.
Pleated perfection, 2022
The darker, mustard yellow of this structured dress complements Princess Kate's brown hair. She paired this look with matching midnight blue heels and a clutch bag.
Game, set, match! 2022
Princess Kate chose a sunshine yellow dress for the Wimbledon Women's Final in 2022 with a bow detail on her left shoulder.
Pastel moment, 2022
This stunning look favours a paler pastel yellow, which she wore with matching gloves, shoes and a bag.
Here's a closer look at the intricate matching fascinator.
Purple
Once the colour of royalty in Roman times, Princess Kate proves that it still is.
Suited and booted, 2023
She cuts a fine figure in this double-breasted suit, accessorised by the sapphire and diamond earrings worn by Princess Diana.
Fit for royalty, 2021
This subtle lilac dress was worn at the Earthshot Prize in 2021 and proved its timelessness, the Princess having first worn it in 2011 on a royal tour of Canada and the US.
Smart casual, 2019
This look is effortlessly cool, matching a burgundy top and shoes with olive green trousers.
Pink
A striking silhouette, 2022
Hot pink worked for Barbie, and it works for Princess Kate too.
Pretty in pink, 2022
The Princess chose a fuchsia pink dress with bishop sleeves for the late Queen's Platinum Jubilee, best remembered for Prince Louis's cheeky facial expressions!
Glitter and glamour, 2022
This glittering pink dress is made of the most incredible material, with dramatic sleeves that accentuate the Princess's frame.
Effortless style, 2011
This shimmering, blush-pink dress stole the show at a gala dinner in 2011.
Gold
A lesson in radiance, 2021
This stunning red carpet moment at the premiere of No Time To Die ensured no-one could look away from the Queen Consort-to-be as she shone in this gold dress.
Timeless elegance, 2020
Another red carpet success was this mesmerising white and gold look, with a beautiful trim detail. The Princess wore her hair in an elegant updo to best show off the dress.
Brown
Simply stylish, 2023
As brown is the colour of the Princess's hair, you won't see her wearing much of it. Here she pairs a brown coat with a pop of colour underneath to flatter her complexion.
Orange
One colour you'll hardly ever see the Princess wear is orange. HELLO! previously spoke to colour analyst Gabriella Winters, who explained why: "I think the answer lies in DNA and Kate's awareness of how certain colours [are] less flattering compared to other colours."
Making it work, 2023
The Princess has opted for a darker orange paired with a light brown coat to complement her complexion.
Pop of colour, 2022
The brighter orange here adds personality and flair to the simple white suit, and it's just the right amount of colour to not overwhelm her face.
LISTEN: Inside Kate's lunch with King Charles before shocking cancer announcement
The secret to a lot of Princess Kate's looks, as well as choosing colours that complement her skin tone, is to match her outfit to her shoes, bags, and accessories. It creates a more cohesive look that instantly feels more stylish.
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