Some brow experts recommend using a silicone-based or oil-based makeup remover to help reduce some of the pigment. Pour some on a facial pad and gently rub on your eyebrows to remove the excess color. You may need to repeat this a couple of times.
One makeup artist on TikTok also recommended using micellar water to help get the brows a bit lighter. Micellar water is often used to cleanse the skin of dirt and oil, due to its composition of micelles. So it may be able to remove some of the tint.
