Colorado Marriage Laws § 14-2-110Prohibited marriages

(1) The following marriages are prohibited: (a) A marriage entered into prior to the dissolution of an earlier marriage of one of the parties, except a currently valid marriage between the parties; (a.5) A marriage entered into prior to the dissolution of an earlier civil union of one of the parties, except a currently valid civil union between the same two parties; (b) A marriage between an ancestor and a descendant or between a brother and a sister, whether the relationship is by the half or the whole blood; (c) A marriage between an uncle and a niece or between an aunt and a nephew, whether the relationship is by the half or the whole blood, except as to marriages permitted by the established customs of aboriginal cultures. (2) Repealed.

(Source: L. 73: R&RE, p. 1019, § 1. C.R.S. 1963: § 90-1-10. L. 78: (1)(b) amended, p. 262, § 47, effective May 23. L. 93: (1)(a) amended, p. 438, § 4, effective July 1. L. 2016: (1)(a.5) added, (SB 16-150), ch. 263, p. 1080, § 3, effective June 8. L. 2018: (2) repealed, (SB 18-095), ch. 96, p. 753, § 5, effective August 8.)