Different colored ribbons are often used as symbols to raise awareness for various causes, issues, or diseases. Each color represents a specific cause or issue. For instance, a pink ribbon is universally recognized as a symbol of breast cancer awareness, while a red ribbon is commonly associated with AIDS and HIV awareness. A yellow ribbon is often tied around trees or worn to show support for military forces, especially those who are deployed overseas, and it also represents suicide prevention. A purple ribbon is used to raise awareness for Alzheimer's disease, domestic violence, and pancreatic cancer among other causes. A blue ribbon is typically associated with child abuse prevention and awareness. It's important to note that these associations can vary by country and organization. Therefore, it's always a good idea to research the specific meaning of a ribbon color in a particular context.