What is the least harmful way to color my hair? | Sally Beauty

What is the least harmful way to color my hair?

Semi-permanent hair color is "deposit only,” which means that it won't chemically change the hair shaft and it contains no ammonia or peroxide. Longer-lasting demi-permanent hair color is also "deposit only" and does not contain ammonia, but does contain a small amount of peroxide, which allows for a subtle, but noticeable, color enhancement. While semi-permanent color lasts for about 8 shampoos, demi-permanent color will last up to 24 shampoos. Both fade gradually, but neither leaves a harsh demarcation line as hair grows out.