What type of hair color results in the most dramatic changes?

Permanent color results in the most dramatic changes to hair color because it contains a combination of ammonia and peroxide, which allows it to penetrate the hair shaft and change the natural pigment permanently. This type of coloring not only effectively covers gray hair but also allows for significant alterations in shade, ranging from lightening the hair to darkening it or changing its tone entirely.

Semi-permanent color and temporary color do not provide the same level of permanence or intensity. Semi-permanent colors typically last through several washes but do not change the hair structure or color fundamentally. Temporary colors are even more short-lived, often washing out after one shampoo, making them suitable for quick changes or experimentation without long-term commitment. Highlighting, on the other hand, involves lifting (lightening) specific sections of the hair rather than altering the entire hair color, which can also create striking contrasts but does so without the comprehensive change that permanent color offers.