The Delaware Investments Colorado Municipal Income Fund, Inc. functions as a closed-end mutual fund, specializing in fixed income investments. Established by Delaware Management Holdings, Inc., its daily operations are overseen by Delaware Management Business Trust. The fund primarily allocates its capital within the United States' fixed income markets, with a particular emphasis on high-quality, un-insured, tax-exempt municipal bonds originating from Colorado. Its portfolio predominantly consists of diverse municipal debt instruments that finance public infrastructure and services. These include various revenue bonds for entities like airports, hospitals, water and sewer systems, as well as general obligation bonds issued by cities, school districts, and other political subdivisions. A core objective for the fund is to achieve an average portfolio maturity falling between 20 and 30 years. Its investment performance is benchmarked against two key indices: the Barclays Municipal Bond Index and the Lipper CE Other States Municipal Debt Funds Average. This U.S.-based fund commenced operations on July 29, 1993.