Combining a navy and green blazer with black dress pants is a nice idea for a classic and polished look. Complete your ensemble with a pair of oxford shoes and the whole ensemble will come together. A good example for teenagers aiming to shift their look towards maturity.
You'll be amazed at how easy it is to throw together this refined look. Just a navy and green blazer teamed with blue dress pants. All you need now is a pair of oxford shoes to complement your look. If you're a teen guy, take inspiration from getups like this to take a more adult approach to your style.