Colo. Rev. Stat. § 4-2-605
rize. (1) The buyer's failure to state in connection with rejection a particular defect which is ascertainable by reasonable inspection precludes him from relying on the unstated defect to justify rejection or to establish breach:
Source: L. 65: p. 1329, § 1. C.R.S. 1963: § 155-2-605. L. 2006: (2) amended, p. 493, § 14, effective September 1.