Not so long ago, finding a gray hair was linked with a reaction of panic. You would find a rogue strand in your hair part, pluck it out, and then worry about the impending golden years and what they meant. Movies showed women spinning into a crisis over their silver hairs, and TV shows had women secretly coloring their tresses behind locked bathroom doors. But nowadays, that stigma is mostly gone. While plenty of women continue to color their hair — whether that's an aesthetic preference or…