Using semi-permanent red hair color takes some of this stress and maintenance away. With no ammonia in the solution, the color never penetrates inside your hair shaft, meaning that you have a beautiful red coating and no damage to the actual strands. Depending upon the type of temporary red hair color you are using, the effects may last from a few washes with shampoo up to a couple of weeks. This is a great option if you are looking to try out a color before committing to it long-term, as semi-permanent red hair dye offers a true version of the color you are trying and demonstrates how it sits over your natural color and whether or not it suits your complexion.