The flag of the state of Delaware consists of a buff-colored diamond on a field of colonial blue, with the coat of arms of the state of Delaware inside the diamond. Below the diamond, the date December 7, 1787, declares the day on which Delaware became the first state to ratify the United States Constitution. The colors of the flag reflect the colors of the uniform of General George Washington.
The coat of arms in the center of the flag was adopted on January 17, 1777. It depicts a shield of horizontal green, blue and white stripes. On the stripes is a sheaf of wheat, an ear of corn, and an ox standing on grass, all representing Delaware's agriculture. Above the shield is a sailing ship. Supporting the shield are a farmer on the left and a soldier on the right. The state motto, below the shield, reads "Liberty and Independence". These symbols are also included on the seal of Delaware.
The current flag was adopted on July 24, 1913. During the American Civil War, regiments from Delaware flew a flag which was similar to the state coat of arms on a field of blue.
The design of the official state flag shall be as follows: A background of colonial blue surrounding a diamond of buff in which diamond is placed the correct coat of arms of the state in the colors prescribed by law and in accordance with § 301 of this title, with the words, "December 7, 1787", to be inscribed underneath the diamond.
The official state colors, colonial blue and buff, are designated by the Textile Color Card Association of the United States, Inc., New York, as "arno blue" (Cable No. 10663), and "golden beige" (Cable No. 10781) respectively; the color shades having been determined by Colorimetric Specifications of the National Bureau of Standards, United States Department of Commerce, in Test No. 2, 1/140565, dated November 18, 1954, which is on file with the Delaware Public Archives, Dover, Delaware. The colors of the coat of arms and other elements of the state flag shall be the following: Husbandman, trousers of gray brown, shirt of red, hat and hilling hoe of brown; rifleman, suit of green, binding, bag and leggings of buff, hat of brown, powder flask and feather of gray; shield, frame of shaded yellow, top panel of orange, center panel of blue, lower panel of white, ox of red brown, grass and corn of green, wheat and branches underfoot of yellow, heraldic wreath to be blue and silver (twisted); ship under full sail to have a dark hull and white sails; date, December 7, 1787, to be white; cord and tassels to be blue and gold.