Colo. Rev. Stat. § 15-12-1004
After assets of an estate have been distributed and subject to section 15-12-1006, an undischarged claim not barred may be prosecuted in a proceeding against one or more distributees. No distributee shall be liable to claimants for amounts received as exempt property or family allowances or for amounts in excess of the value of his other distributions as of the time of such distributions. As between distributees, each shall bear the cost of satisfaction of unbarred claims as if the claim had been satisfied in the course of administration. Any distributee who shall have failed to notify other distributees of the demand made upon him by the claimant in sufficient time to permit them to join in any proceeding in which the claim was asserted against him loses his right of contribution against other distributees.
C.R.S. § 15-12-1004