Bliss, a bitmap image produced from a photograph of a landscape in Napa County, California, is so called because it includes gently slopping green hills and complemented by clouds in a blue sky. The image is a default computer wallpaper included with Microsoft Windows XP. The photo was taken for a digital design company which in turn acted as an inspiration for a huge advertising campaign for Microsoft Windows. Since then, it has undergone several changes in its appearance. It may be the most viewed and used wallpaper. The scene with its mixture of colors brings a feeling of peace and is pleasing to the eye.