The yellow ribbon is used as an expression of support for a loved-one who is far away. Recently, it has been used as a symbol of support for those in military service as well as the emblem for the international suicide prevention program. The origins of the yellow ribbon custom are unclear, but references to it date back at least 400 years. These images are free for your personal use for email, your phone, or to post on any website, social network page or blog.