The Oliver flag became the official flag of Missouri in 1913.

Marie Oliver described her flag design as follows: “The design I offer embraces all the colors of the national flag—red, white and blue—which recognizes that the State of Missouri is a part and parcel of the Federal Government. At the same time it represents the state as possessing a local independence, a local self-government, but in perfect harmony with the great national compact as shown by the mingling of the colors red, white and blue, on every side of it. The coat-of-arms of the state is in the center of the national colors and represents Missouri as she is—the geographical center of the nation. The twenty-four stars on the blue band encircling the coat-of-arms signifies that Missouri was the twenty-fourth state admitted into the Union of States. The blue in the flag signifies vigilance, permanency and justice; the red, valor; and the white, purity.” [Dains, Show Me Missouri Women: Selected Biographies, v. 1, p. 258.]