Slightly down the formality level, but again hardly seen today beyond Prince Charles is the morning suit with match coat, trousers and waistcoat. Then you could go with one single color, but again its pretty rare these days.
Toddler Prince Charles (Charles Philip Arthur George) Nov of Wales, UK seated, looking to his left & holding a silver ball. child of Queen Elizabeth II (Elizabeth Alexandra Mary) Apr UK, Adams Studio, by Marcus Adams 26 Oct
Prince Charles plotted revenge New Zealand because of horse fall jibes
Duchess of Cornwall wearing the late Queen Mother's 3 strand pearl necklace.I've Got A Feeling "The Queen Mum" Got Along Famously With Camilla.Just A Hunch.They Seem To Have Both Had A Wicked Sense of Humor!