DENVER - The debate for gay marriage equality is continuing in Colorado.

Nine same-sex couples filed a lawsuit Wednesday challenging Colorado's same-sex ban.

"Same-sex couples in Colorado are relegated to a second-class level of citizenship that denies their relationships the full panoply of rights enjoyed by married opposite-sex couples," the lawsuit filed in Denver County District Court says.

The lawsuit lists the state of Colorado, Governor John Hickenlooper and Denver County Clerk Debra Johnson as defendants.

Colorado currently allows civil unions but does not recognize gay marriage.

9NEWS reached out to Gov. Hickenlooper's office as well as the governor's Office of Constituent Service for comment, but has not received a response.

Attorneys for the plaintiffs are working on a statement as of Wednesday afternoon.

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