Summer is a great time to wear color- do not be afraid of it! For a more subtle approach to color watch out for the intensity of the colors. This look includes a rich green pair of chinos with a light blue oxford shirt and red sunglasses for a touch of contrast.
Note- The oxford shirt is a must-have for summer, especially one that is made of Egyptian cotton like this one from Hugh & Crye. The medium weight of the fabric makes it a great option for the warmer climate. Also, you can't go wrong with a light blue shirt. They work well for adventures around town during the weekend and for more professional settings during the week.