Background blue or red, color photos, etc. The marriage registration photos in Danyang City, Jiangsu Province stipulated in the "Marriage Registration Service Standard System" that the background of marriage certificate photos is blue or red. The dimensions are 40mm wide and 60mm high. Therefore, the wedding registration photos in Danyang City, Jiangsu Province require blue or red background, color photos and so on. For the wedding registration photos in Danyang City, Jiangsu Province, it is suggested to use photos with red background, which symbolizes prosperity and can also express happiness. It is recommended to wear a white shirt, which is clean, neat and formal.