The Colorado state flag consists of three alternate stripes of equal width. The two outer stripes are a blue of the same color as in the blue field of the national flag and the middle stripe is white. At a distance from the staff end of the flag of one fifth of the total length of the flag there is a circular red C, of the same color as the red in the national flag of the United States. The diameter of the letter is two-thirds of the width of the flag. The inner line of the opening of the letter C is three- fourths of the width of its body or bar, and the outer line of the opening is double the length of the inner line thereof. Completely filling the open space inside the letter C is a golden disk. The gold is said to either stand for the state's sunshine or the gold mined in the state.
Colorado flags for outdoor use are constructed of a durable nylon fabric especially developed for flag use. Nylon's tight weave provides maximum beauty and flyability as well as brilliant, fast colors. Its weave helps shed pollution, dirt and grime that the looser weave alternatives absorb. Nylon is water repellent and mildew resistant.