Colo. Rev. Stat. § 8-41-102
An employer who has complied with the provisions of articles 40 to 47 of this title, including the provisions relating to insurance, shall not be subject to the provisions of section 8-41-101; nor shall such employer or the insurance carrier, if any, insuring the employer's liability under said articles be subject to any other liability for the death of or personal injury to any employee, except as provided in said articles; and all causes of action, actions at law, suits in equity, proceedings, and statutory and common law rights and remedies for and on account of such death of or personal injury to any such employee and accruing to any person are abolished except as provided in said articles.
C.R.S. § 8-41-102
This section is similar to former § 8-42-102 as it existed prior to 1990.