Copper alloy is considered as the widely used materials in the mintage.Following the rapid development of the economical society and the color of mintage were becoming higher and higher.Study and development of copper alloys were becoming more and more widely

including circulation coin

commemorative coin

signet and so on.CIELAB uniform color space was used to describe the color of alloy.The common copper alloys coin at home and abroad were summarized.The formation mechanism and influencing factors of the surface color of the mintage alloy were analyzed

and the design principles and research summaries of copper alloys with different color coinage were analyzed.The future development direction of the copper alloy was expounded.