This casual combo of a light blue chambray long sleeve shirt and black skinny jeans is super easy to pull together in seconds time, helping you look seriously stylish and prepared for anything without spending a ton of time combing through your wardrobe. Go ahead and add derby shoes to the mix for a dose of elegance. Super cool and entirely summer-appropriate, you can rock a version of this look all season long. Wondering how to perfect casual outfits as you are making it through your teenage years? This combination is a good illustration.