DENVER — If bakeries can be compelled to make wedding cakes for same-sex marriages, can they also be forced to create anti-gay cakes?

That’s the question before the Colorado Civil Rights Division after a customer filed a complaint against Azucar Bakery in Denver for refusing to write anti-gay messages on a Bible-shaped cake.

Owner Marjorie Silva told 9News in Denver that she received a complaint alleging religious discrimination from the state Department of Regulatory Agencies after she declined in March a customer’s request to write messages like “God hates gays” on a cake.

She said he handed her a piece of paper with the messages. “After I read it, I was like, ‘No way,’” Ms. Silva said. “‘We’re not doing this. This is just very discriminatory and hateful.’”

She said she had no problem creating a Bible-shaped cake — she does so frequently — but told him that she would not write the messages he requested, including a depiction of two men holding hands with an “X” over them.

The man who filed the complaint has been identified by Denver news outlets as Bill Jack, founder of the Worldview Academy in Castle Rock, which is a “non-denominational organization dedicated to helping Christians think and live in accord with a Biblical worldview,” according to the website.

Mr. Jack issued a statement to 9News saying, “I believe I was discriminated against by the bakery based on my creed. As a result, I filed a complaint with the Colorado Civil Rights division. Out of respect for the process, I will wait for the director to release his findings before making further comments.”

Ms. Silva posted a photo of herself Monday on Twitter holding a white sheet cake with the message, “Stop the hate. Don’t discriminate,” written in pink frosting.

The case comes after the owner of another Colorado bakery, Masterpiece Cakeshop in Lakewood, was found guilty of discrimination by the Colorado Civil Rights Commission for declining to bake a wedding cake for a same-sex couple.

The owner, Jack Phillips, was ordered by the commission in May to “re-educate his staff that Colorado’s Anti-Discrimination Act means that artists must endorse all views, compels him to implement new policies to comply with the commission’s order, and requires him to file quarterly ‘compliance’ reports for two years,” according to a press release from the Alliance Defending Freedom, which represents him.

Mr. Phillips, who offered to bake the couple another kind of cake but said baking a same-sex wedding cake would violate his Christian beliefs, has filed an appeal with the Colorado Court of Appeals.