The main colours used in this image is green and light blue. It uses an analogous colour scheme of cool colours which helps to give off a very calm and peaceful mood.
The image uses high saturation for the most part, with some desaturation used in the colours to add detail. There are many different shades of brown used for the trees in the image and these are used to show how the tree is reacting to the surrounding light, with parts hidden from the sun in a darker shade of brown. There are a lot of different green tints used for the background of the image, with the trees increasing in tint the farther back they are. This helps to create depth for the image as the lighter trees look further back than the darker ones.
Morgan Adams Next Gen Blog 