Which hair colors are typically mixed with a developer?

Demi-permanent hair color is specifically designed to be mixed with a developer. This type of color uses a low-volume developer to oxidize the color molecules, which allows for longer-lasting color results compared to temporary or semi-permanent options. The developer activates the dye and helps it penetrate the hair shaft, resulting in richer, more vibrant color that can last for several weeks, depending on factors such as hair type and care.

In contrast, temporary hair color does not require a developer because it coats the hair rather than penetrating it. Semi-permanent hair color may sometimes involve a developer, but it can also be used without one, depending on the specific formulation. This makes demi-permanent the most appropriate choice when discussing hair colors that typically mix with a developer for optimal results.