If you're scouting for a modern casual but also seriously stylish getup, try pairing a navy long sleeve t-shirt with blue jeans. Low top sneakers are a nice choice to finish this getup.
Navy Long Sleeve T-Shirt with Low Top Sneakers Cold Weather Outfits For Men
Teaming a navy long sleeve t-shirt with grey dress pants is an on-point option for a casually smart ensemble. As for the shoes, stick to the casual route with low top sneakers.