What is the primary characteristic of demi-permanent hair color?

The primary characteristic of demi-permanent hair color is that it deposits color without significantly lightening the natural hair. Demi-permanent colors typically contain low amounts of ammonia or are ammonia-free, allowing them to add depth and tone to the hair while leaving the natural pigment largely intact. This makes them an excellent choice for enhancing natural hair color, covering gray hair, or making subtle changes.

Demi-permanent colors typically last longer than semi-permanent colors but are not designed to provide the same level of lightening as permanent colors, which is why they are suitable for those who want to enrich existing color or for those looking to refresh their look without committing to a full permanent change.