A well-executed combo of a white henley shirt and white chinos will set you apart effortlessly. Black suede driving shoes are the right shoes here to get you noticed. A reliable option combination appropriate for 30-something men who like casual clothing.
If the setting allows casual styling, consider wearing a white henley shirt and white chinos. To give your overall ensemble a more laid-back spin, why not introduce a pair of dark brown leather sandals to the mix? This combination shows that after thirty your style options are looking good.