Pairing a navy and green plaid blazer and dress pants will prove your outfit coordination prowess. Go for dark brown loafers for maximum style points. This is a good illustration of how to dress with style and look good as you move through your teens.
Channel your inner British gentleman and consider wearing a burgundy argyle cardigan and dress pants. Complement your look with dark brown loafers and the whole ensemble will come together brilliantly. This outfit should clear any doubts you had about dressier looks as a teenager.