When I was up at Bogus Basin recently, I saw the sunset and I knew that I just had to take this picture because of the beautiful colors in the sky.  The glow of the sunset reflects orange on the snow and adds interest to the texture in the snow.  The trees in the middle ground separate the hill in the background from the hill in the foreground and adds new color to the scene as well.  The color palette balances out perfectly as the blue of the sky and snow interact with the orange of the sunset with green adding a third element to ground the picture.