Glaucophobia

Glaucophobia (from Latin glauco, "gray") is fear of the color gray. This color phobia is often caused by experiences during the storm, since storm clouds are gray, and by simply growing old to have gray hair (sometimes darkish blue or green depending on the cloud). So glaucophobics would avoid be in that trigger and other objects that are gray.

Glaucophobia is most commonly suffered by the elderly than any other age groups.