Glaucophobia

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

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