While hazel eyes look great with basic black eyeliner, they often look best - and most striking - when lined with rich, autumnal colors. Bronzes, golds and various browns pick up the different color tones and draw attention to the eyes.
Because hazel eyes have flecks of different colors in them, different eyeliners highlight certain shades. According to YouBeauty, metallic bronzes make eyes appear more golden, while rich green shades pick up on underlying green tones. If looking for a dark eyeliner, people with hazel eyes should try for a dark brown, with some golden undertones. For a bolder look, using a deep plum to line the eyes is striking because of the color contrast and makes eyes appear greener as well.