Grecian 5 5-Minute Haircolor, Dark Brown or Medium Brown
This men's hair dye can be used on facial hair as well as the hair on your head. There's a brush with a mixing tray in every package, and it gets rid of grey in just five minutes. The rich, thick formula isn't prone to dripping, and it is made with all-natural gentle ingredients, which means there is no ammonia. The color lasts up to six weeks and the built-in conditioner panthenol leaves your hair healthier and silky. It's available in such shades as medium brown and jet black, but it seems to work best for those with very dark shades of hair.