Colo. Rev. Stat. § 24-80-904
A state flag is hereby adopted to be used on all occasions when the state is officially and publicly represented, with the privilege of use by all citizens upon such occasions as they may deem fitting and appropriate. The flag shall consist of three alternate stripes to be of equal width and at right angles to the staff, the two outer stripes to be blue of the same color as in the blue field of the national flag and the middle stripe to be white, the proportion of the flag being a width of two-thirds of its length. At a distance from the staff end of the flag of one-fifth of the total length of the flag there shall be a circular red C, of the same color as the red in the national flag of the United States. The diameter of the letter shall be two-thirds of the width of the flag. The inner line of the opening of the letter C shall be three-fourths of the width of its body or bar, and the outer line of the opening shall be double the length of the inner line thereof. Completely filling the open space inside the letter C shall be a golden disk; attached to the flag shall be a cord of gold and silver intertwined, with tassels one of gold and one of silver. All penalties provided by the laws of this state for the misuse of the national flag shall be applicable to the said state flag.
C.R.S. § 24-80-904
For the penalty for mutilation of flag, see § 18-11-204 .