While it’s not said to be strictly enforced, royal etiquette dictates that black is reserved for mourning periods only. It’s incredibly rare to see a royal lady wearing an entirely monochrome outfit during an official daytime engagement.
Meghan, the Duchess of Sussex though, often breaks this rule, particularly since she stepped away from royal duties. Meghan has mastered the art of power dressing with a sober wardrobe of sleek, dark hues, In fact, she’s largely stuck to an all-black wardrobe ever since her fairytale royal wedding to Prince Harry in 2018.
Black has long been associated and seen as a colour of confidence, with colour psychology suggesting those who wear it are more likely to feel bold, powerful, and dominant.