If the setting permits casual styling, consider pairing a blue dress shirt with a crew-neck t-shirt. For something more on the classy side to finish your outfit, add black leather loafers to this outfit.
Blue Dress Shirt with Crew-neck T-shirt Smart Casual Chill Weather Outfits For Women
If you gravitate towards relaxed style, why not dress in a blue dress shirt and a crew-neck t-shirt?