Ah! an article popped up "Can Henna Cover Grey Hairs?" That's my goal! Since I decided to stop these grays just embarked on their own journey. It is like the hair color was the parent and as soon as it "darken the door" gray became a misbehaving child; just all over the place, perhaps a mind of its own. If you used context clues you could surmise that "darken the door" means leave. I am starting this quest to color my hair with Henna! Follow along with me.