A navy long sleeve shirt and navy jeans paired together are a good match. Complete this getup with a pair of black and white canvas high top sneakers to effortlessly amp up the fashion factor of your ensemble. Perfect if you're looking for some amazingly inspiring casual style for maturing guys.
If you use a more relaxed approach to dressing up, why not choose a navy long sleeve shirt and navy chinos? For something more on the casual end to complete this ensemble, introduce black and white canvas high top sneakers to the equation. As you turn 30, you probably want to start dressing like a grown man. If that's the case, combos like this are a goofproof option.