You will find that a solid T-shirt like this one is a wardrobe workhorse.
All In Motion Men’s Linear Mesh Raglan T-Shirt CN6 Olive Green Medium NWT
This green is a great middle ground between bright and dark shades.
Goodfellow & Co Men’s XXL Standard Fit Tropical Palm Print Tank Top
I love how the multicolor palette keeps this tee from feeling too plain.
Men’s Sleeveless Workout Tank Top Bodybuilding Gym Sports Muscle Fitness T-Shirt
The red hue here reminds me of a classic sports jersey, but way more comfortable.
32 Degrees Weatherproof Mens Cool Tee Short Sleeve Crew Neck T Shirt, 2 Pack
This tee is breathable enough for the gym but stylish enough for everyday.