GUILT-FREE GLAMOUR!® Cattail is a mid-toned chocolate brown hair dye. Cattail has rich, warm undertones so it can well on most blonde hair levels but for best results use on pre-lightened hair! If you’d like to punch up this shade, try adding in a few drops of Raven or Blue Panther to your mix (especially If you're using it on unbleached hair)! All semipermanent dyes work best on pre-lightened hair. Always do a strand test to make sure the color works well for your base color! Not sure?