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.
Charles gets a hug from his grandson while out and about in Scotland
The Tudor Heirs The surviving children of Henry VII and Elizabeth of York.~ Arthur Prince of Wales, Margaret Queen of Scotland, Henry King of England, and Mary Tudor Queen of France. The surviving children of Henry VII and Elizabeth of York.