The flag was originally designed by Andrew Carlisle Johnson in 1911. The C-shaped emblem contains the colors of Spain which originally claimed the area, and the gold ball represents the state's mineral wealth.
Precise colors of red and blue were not designated in the 1911 legislation and some controversy arose over those colors. In 1929, the General Assembly stipulated the precise colors of red and blue to be the same as the U.S. national flag.
Controversy also arose over the size of the letter C, and in 1964, the General Assembly modified the 1911 legislation by revising the distance from the staff for the letter C and its diameter.
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Official Seal of the State of Colorado