I think it depends on the eyebrows. If it’s overpowering, just don’t do it! Use a color a bit lighter than the brow color and pencil (or brush tint) in only slightly for a more fuller, but still natural appearance. You can also use a brown colored mascara (MAC does a brow mascara) just to set and fill in without making everything seem too overdone. Everybody has unique eyebrows and the technique isn’t universal by any means. It’s about experimentation and negotiation for every face.