BLUE LIVES MATTER wristband featuring the Thin Blue Line. The Thin Blue Line is a symbol used by law enforcement to commemorate fallen and to show support for the living law enforcement officers and to symbolize the relationship of law enforcement in the community as the protectors of fellow civilians from criminal elements. Each stripe on the emblem represents certain respective figures: the blue center line represents law enforcement, the top black stripe represents the public and the bottom represents the criminals. The idea behind the graphic is that law enforcement (the blue line) is what stands between the violence and victimization by criminals and the would-be victims of crime.