Instead choose an angled eyeliner brush (like this one for under $5) that you don’t really use and don’t mind covering in dye. This will be much more accurate for dying your eyebrows.
I like to apply the eyebrow tint with a double-ended spoolie brush. This way, you can brush the tint through your brows and use the angled end to really tidy up the shape. Once you’ve applied ...