The Amplified?formula for our semi-permanent hair color has 30% more pigment than our High Voltage?Classic hair color!
This formula is not meant for those with commitment issues, as it will last through a few washes. .Rockabilly Blue is one of our strongest true, neutral blue hair dyes. This vibrant, ultra-powerful blue leaves cool tones on virgin, unbleached hair. For head turning results, we recommend lightening hair to a light level 9 blonde and toning hair before use to prevent unwanted hues.