Review Of Demi Vs Permanent Hair Color 2023. It can be a nice option if you have a little bit of gray that you’re looking to cover up and help blend in with the rest of your hair. It contains no ammonia but does have a small amount of peroxide, which opens the hair cuticle slightly so that some color will be absorbed.

The most significant difference between semi and demi is permanency. Web demi permanent color is very different from permanent hair color. Semipermanent color washes out within a few washes, depending on the color.