A seven-member panel on Friday upheld an administrative law judge's ruling against a Colorado baker who refused to make a wedding cake for a gay couple.

Colorado's Civil Rights Commission told suburban Denver-based Masterpiece Cakeshop owner Jack Phillips that he must serve all customers regardless of sexual orientation or face fines.

The panel unanimously agreed with Judge Robert N. Spencer's finding in December that Phillips violated the state's civil rights law.

In 2012, Phillips refused to consider baking a cake for Dave Mullins and Charlie Craig, who have since married in Massachusetts and held a reception in Denver. Phillips said that serving the couple would violate his religious faith. Colorado recognizes gay and lesbian couples with civil unions, not marriage.

The couple sued, claiming that Phillips' faith does not give him a right to discriminate.

Phillips previously stated that he would rather shutter his business of 20 years than support same-sex marriage.

“I will stand by my convictions until somebody shuts me down,” he told reporters on Friday.

The commission ordered Phillips to report quarterly for two years on any customers he refuses to serve.

An appeal to the Colorado Court of Appeals is under consideration, Phillips' attorney said.