Simply, a great suit. Tan suit, white shirt, blue tie, except for the shoes.
If I'm in a tweed suit, it's classic. If I'm on the beach in a swimsuit, it becomes sporty. It doesn't just work with the clothes I have on—it adds something to everything I wear."—Jim Moore, GQ creative director (I'd own one)
Blue flecked oxford button shirt, grey jeans, grey crew-neck sweater, olive green jacket, and black sneakers.
fool-proof colour combination / Ben Ferrari's New York Street Style - Best Dressed Men in NYC: Style: GQ