Will Demi Permanent Color Wash Out Completely?
Demi-permanent hair color will eventually wash out completely over time, although the length of time it takes for the color to fade will depend on a variety of factors including the shade of the color, how often the hair is washed, and how well it’s cared for. Typically, demi-permanent color lasts between six to eight weeks before it begins to fade and requires a touch-up. However, if the hair is washed frequently or exposed to harsh environmental conditions, the color may fade faster.