Won’t fade.
Repairing red and blue eyebrows will not cause fading, because the repair process usually involves trimming and adjusting the eyebrows that have been dyed. The purpose of red and blue brow repair is to trim and shape, as well as fill in and correct uneven color. The repair process will not have a direct impact on the dye and will not cause fading. If you want to change the color of your eyebrows, you will need to re-dye them, and the dyed color will gradually fade over time.