This is yellow in my awareness series. Other colors are pink, red, orange, green, lime green, black blue and purple.
The yellow ribbon has had a long history. More recently it has been used for support of the hostages in the Iran hostage crisis, and support of troops deployed over seas. It is also an emblem for suicide awareness and endometriosis.
Congrats to Kiteflyerbec and poeanne for co-FTF
The full awareness series I have placed is: