The background of the Oklahoma flag is blue. This was chosen because it was the color of the flag carried by Choctaw Indians during the Civil War. There are over 200,000 Choctaw Indians in the world, and their center is in Oklahoma.
The round shield on the Oklahoma represents an Osage warrior's shield, decorated with eagle feathers. The Osage Nation also has its headquarters in Oklahoma.
Crossed on the shield are an olive branch and a peace pipe, or calumet. These are traditional symbols of peace among Europeans and Native Americans.
The crosses on the flag represent "high ideals." Crosses of many types have been used in many cultures, including some pre-Christian cultures.