Just for Men Mustache and Beard Dye. Every two weeks or so.
Pick a color a shade lighter than you think you need, leave on for full five minutes. wipe of with toilet paper, throw in toilet, and wash your face with soap. Voila!
This "beard" formula is "tougher" than regular hair colorant, and that's what you need for coarse, hard-to-dye eyebrow hairs. Also, it's thick, so I promise you it won't dribble into your eyes.
You're welcome.
http://www.justformen.com/products/mustache-and-beard/?shade=medium-brown