Colo. Rev. Stat. § 31-10-1523
It is unlawful for any person directly or indirectly, by himself or herself, or any other person in his or her behalf, to make use of any force, violence, restraint, abduction, duress, or forcible or fraudulent device or contrivance, or to inflict or threaten the infliction of any injury, damage, harm, or loss, or in any manner to practice intimidation upon or against any person in order to impede, prevent, or otherwise interfere with the free exercise of the elective franchise of any qualified elector, or to compel, induce, or prevail upon any qualified elector either to give or refrain from giving the elector's vote at any municipal election or to give or refrain from giving the elector's vote for any particular person or measure at any such election. Each such offense is a class 1 misdemeanor.
C.R.S. § 31-10-1523
This section is similar to former § 31-10-1323 as it existed prior to 1975.