According to Essie, Queen Elizabeth has been wearing the light pink “ballet slippers” nail polish since 1989 — and strictly that. As for the Duchess of Cambridge, she seemingly favors neutral colors as well. But this shared affinity for the same shades allegedly is more about royal etiquette than personal preference. Royal wardrobe guidelines state that no brightly colored nail polish should be worn during public engagements.
Nail polish isn’t the only thing that’s regulated. Scroll through the gallery for other things, from voting to flying, that the royal family is restricted in.