What color goes with the black five elements on the billboard?

This depends on the five elements of the house owner. Generally speaking, red and gold signboards can ward off evil and attract wealth

White and blue. No defeat. Avoid red and green. . . In theory, this is the case. . If you want to rely on external force, it seems to be white. . Gold produces water. . Colors related to earth will be incompatible and colors related to fire or wood will be discouraging. . Colors related to water and gold are best. .