What does a purple ribbon mean?

Purple Ribbon :
Meaning: This color is a symbol of pancreatic cancer, testicular cancer, thyroid cancer, domestic violence, ADD, alzheimer's, religious tolerance, animal abuse, the victims of 9/11including the police and firefighters, Crohn's disease and colitis, cystic fibrosis, lupus, leimyosarcoma, and fibromyalgia.

Link-

http://www.trinitylondon.com/awareness-ribbon-meanings.asp