Princess of Wales is perfectly polished in powder blue Elie Saab for Buckingham Palace Garden Party Tatler Trumpet Sleeve Floral Embroidery Girl's Han Chinese Costume Princess Dress Green 15 Dress Code' at Kensington Palace: Stepping into royal elegance Daily Sabah Inside royal fashion protocol: The black outfit rule and other strict royal dress codes explained Royal dress code: The Queen and her family's rules, from shorts and tiaras to nude nail varnish London Evening Standard The Standard