If the setting permits a casual outfit, try pairing a red and black long sleeve shirt with a long sleeve t-shirt. If you're hesitant about how to finish, a pair of black canvas low top sneakers is a tested option.
Red and Black Long Sleeve Shirt with Long Sleeve T-Shirt Relaxed Outfits For Men
If you gravitate towards off-duty style, why not wear this pairing of a red and black long sleeve shirt and a long sleeve t-shirt? Add white high top sneakers to the mix to keep the ensemble fresh.