With all these rules and regulations behind dressing as a royal, it's a wonder Kate Middleton and Meghan Markle can keep up.

But apparently, there's one style secret this pair share that has nothing to do with the Palace rules, and more to do with being a 'celebrity'.

We know that Meghan loves dressing in neutral tones but, on occasion, she hasn't shied away from a dab of colour, either. And Kate? Well, her wardrobe is full of colour-blocking looks from red to pink, blue and green.

The Duke & Duchess Of Sussex Attend 'Your Commonwealth' Youth Challenge Receptionpinterest
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Kate Middleton colourpinterest
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But have you noticed that there's one colour neither of the Duchesses have ever worn, and probably never will? (In public, anyway).

Harpers Bazaar Australia uncovered the fact that neither Kate nor Meghan have been spotted out and about in orange. And no, it's not royal protocol to avoid tangerine impersonations. According to The Express, however, it is a colour that doesn't really photograph well, so tends to be avoided by celebs in general.

Fun fact!

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While Kate and Megs may want to shy away from orange, if there's one thing our Queeny never fears, it's a little bit of colour. In fact, here she is on Christmas Day wearing the exact colour that apparently doesn't look good in photos.

Members Of The Royal Family Attend St Mary Magdalene Church In Sandringhampinterest
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Queen Elizabeth, here proving points wrong since 1926.

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Jess Edwards
Deputy Editor

Jess Edwards is Cosmopolitan UK’s Deputy Editor, working to deliver the very best experiences across the brand's platforms (print, social, video, digital), products and events, including a focus on our membership offering, Club Cosmo. Jess has worked in the media industry for almost 20 years and at Cosmopolitan for over 10 years, joining the brand as Fashion Editor and later going on to lead the digital team as Site Editor. With her background in lifestyle journalism, it is no surprise that you’re most likely to find her in the Fashion section and exploring the very best in hospitality via our Travel pages.