If you don't like being too serious with your outfits, consider pairing a blue horizontal striped long sleeve t-shirt with khaki chinos.
Blue Horizontal Striped Long Sleeve T-Shirt with Khaki Chinos Casual Outfits
A blue horizontal striped long sleeve t-shirt and khaki chinos paired together are a great match. Add a pair of black and white canvas low top sneakers to this ensemble and the whole ensemble will come together perfectly.