Colo. Rev. Stat. § 44-20-213
In addition to the criminal and civil penalties provided in this part 2, any person who is injured in his or her business or property by any other person or corporation or association or partnership, by reason of any thing forbidden or declared to be unlawful by this part 2, may sue therefor in any court having jurisdiction thereof in the county where the defendant resides or is found, or any agent resides or is found, or where service may be obtained, without respect to the amount of controversy, and to recover twofold the damages sustained by him or her, and the costs of suit. When it appears to the court before which any proceedings under this part 2 are pending that the ends of justice require that other parties shall be brought before the court, the court may cause them to be made parties defendant and summoned, whether they reside in the county where such action is pending or not.
C.R.S. § 44-20-213
This section is similar to former § 12-6-213 as it existed prior to 2018.