Gray & White I wear this for my dad wristband
We know a wristband won't change these diseases, but what they will do, is show our solidarity for those dealing with their fight, journey, battle, process, whatever you want to call it. Seeing a ribbon in the color that represents what you are dealing with shows there are others who support you. That's pretty special.
Grey Awareness ribbons have been known to represent the following causes, but is not limited to this list.
Alpha-1 Antitrypsin Deficiency
Brain cancer awareness
Borderline Personality Disorder Awareness
Diabetes awareness (more commonly diabetes is symbolized by the blue circle, as designated by the International Diabetes Federation)