I recommend coloring this scene with a blend of light and dark greens to represent the evergreen trees of the forest, followed by blues for the river and lighter blues for the snow. The bridge should be light brown and the fence should be a deep brown. The hunter can be colored yellow and light brown, with a tan coat and rifle. For the deer, use white, light and dark browns, as well as lighter shades of gray, to create realistic fur. Finally, the field in the background can be shades of green, yellow, and brown for a meadow-like effect. With this color scheme, the viewer will feel like they are looking at a serene winter forest with a river, bridge, and meadow.