The old no-white-before-Memorial-Day adage is obviously passé, but there is something exciting about ditching dark colors and embracing summer’s purest hue with a head-to-toe white look. Ask any sneakerhead, and there is nothing like a pair of fresh new white sneakers right out of the box. It’s a stylistic refresh that has a lot of millage, suiting almost any occasion, including summer’s formal and casual events….