Despite having so many traditions to abide by, Kate Middleton and Meghan Markle aren't afraid to push the boundaries when it comes to their personal styles.
The Duchesses have been rewriting the royal fashion books with their modern outfits. They're not afraid to wear something the Queen may not approve of, like Meghan's pantsuits and Kate's wedges.
But while the sisters-in-law often bend the rules a bit, there are certain protocol they always adhere to. For instance, royal women are barred from wearing colorful nail polish, which is why Kate and Meghan are only ever spotted with pale pink or clear polish.
If you've watched them closely, you've probably noticed that both Kate and Meghan never cross their legs at the knee while seated. As the rules dictate, they must always keep their knees together "in the duchess slant," which makes them appear modest while accentuating the length of their legs.
The royal women also have to follow etiquette for wearing tiaras. The expensive and flashy headpieces are to be worn by married ladies only when attending prestigious events that take place in the evening. We've already seen Kate wear hers on multiple occasions, but so far Meghan has only been seen with one on her wedding day.
While many of these requirements have become common knowledge, there is one unwritten and unofficial dress code that comes as a surprise to many.
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Tons de azul na realeza 💜💙Meghan Markle e Kate Middleton juntas e coordenadas em evento hoje em Londres. O modelo acinturado de Meghan é @jasonwu, e o violeta da gravidinha é @seraphinematernity - confira mais no nosso stories! ✨✨ #meghanmarkle #katemiddleton #meghanandkate #advoguettes #executivas #roupadetrabalho #roupadegravida
Although Kate and Meghan have dressed in a range of colors, from pastel hues to vibrant shades, there is one specific color you'll probably never see them wear to carry out their royal duties: Orange.
Harpers Bazaar Australia were among the first to make the interesting observation, claiming that in the eight years since Kate officially became part of the royal family, she's worn many colorful ensembles, but only came "close just once in a pinkish peach ensemble."
There have since been a few theories as to why the Duchess of Cambridge and the Duchess of Sussex steer clear from the bright hue.
Harpers Bazaar thinks it may be a personal choice, but according to The Express, many royal women leave orange outfits on the back burner because it doesn't photograph well.
While the orange may be off the table for Kate and Meghan, it certainly isn't for Queen Elizabeth II, who has worn it a few times, including Christmas.
Apparently, Her Majesty wants people to easily spot her in a crowd, and the colorful clothes help with that.
It's entirely possible that her granddaughters-in-law avoid the color so they wouldn't upstage the Queen. After all, they've already taken so much of the attention away from her over the last few years.