Bliss is the name of a BMP image produced from a photograph of a landscape in Napa County, California, east of Sonoma Valley. It is so named because it contains rolling green hills and a blue sky with stratocumulus and cirrus clouds. The image is used as the default computer wallpaper for the "Luna" theme, which is included with Microsoft Windows XP.
The photograph was taken by the professional photographer Charles O'Rear, a resident of St. Helena, Napa County, for digital-design company HighTurn. O'Rear has also taken photographs for Bill Gates' private Seattle stock photography company Corbis and Napa Valley photographs for the May 1979 National Geographic Magazine article Napa, Valley of the Vine.