No provocative dresses
At a younger age, Kate wore bolder clothes and had a more flamboyant style. While in college, she was usually seen flaunting clothes that may be considered too bold as a Duchess. Today she has changed her wardrobe and is still seen in stylish clothes, to fit in her role as the Duchess of Cambridge. You will never see her wearing fancy patterns or showing a lot of flesh. The royals consider showing flesh as vulgar and humiliating, this is why all the ladies belonging to the royal family are seen wearing beautiful clothes that cover their body more than exposing it.
Members of the Royal Family are not allowed to interfere in UK politics, but the dress they wear must always be politically correct. Kate almost always wears a modest dress and barely comes out in pants. If you want to copy her style, stock up on skirts and dresses with solid prints and don’t forget the hat, of course. The royal family knows for sure, that skin is not to be shown in public, this is why there is such emphasis on wearing modest clothes, whether at home or during a public engagement.