Colo. Rev. Stat. § 5-21-114
Notwithstanding article 80 of title 13, all actions brought under this article 21 must be commenced within four years after the date on which any violation of this article 21 occurred or the date on which the last in a series of the acts or practices occurred or within four years after the plaintiff discovered or in the exercise of reasonable diligence should have discovered the occurrence of a violation of this article 21; except that the period of limitation provided in this section may be extended for a period of one year if the plaintiff proves that failure to timely commence the action was caused by the defendant engaging in conduct calculated to induce the plaintiff to refrain from or postpone the commencement of the action.
C.R.S. § 5-21-114