An eyebrow tint is a semi-permanent dye that darkens and defines your brow hairs (even those tiny, hard-to-see hairs that you might not even know are there) that can last up to six weeks before fading. The brow tint shade is completely customized, and once you discuss what you’re looking for with your brow technician, they’ll mix the dye to match your coloring (which usually ends up being the same shade as your natural hair color, or half a shade to a full shade darker). It only takes five to ten minutes for the dye to work, before the technician (or you, at home) wipes it off, leaving you with instantly bolder, fuller-looking brows.