Amazon (2) Despite the ever-changing trend cycle, there are a few clothing items that will never go out of style — and for spring and summer, denim jackets will always be a wardrobe staple.

The easiest way to pull it off, without looking like you’re in a boy band, is by mixing shades—pair light denim with dark, or vice versa. For instance, a mid-wash denim jacket with dark jeans ...