About Semi-Permanent Hair Color & Relaxer. Part of the series: Hair Products & Hair Styling Tools. Semi-permanent hair color is great with a relaxer treatment, keeping the hair strong and shiny, as permanent hair color can be too much for the processed hair to handle. Only use semi-permanent hair color on relaxed hair, specifically the Finesse semi-permanent color, with professional advice from a hair designer and color specialist in this free video on hair care.