Rockabilly blue we recommend lightening hair to

we recommend lightening hair to very light level 9 blonde or lighter before use

it is required to lighten hair to the lightest level 10 blonde or lighter and toning hair that has yellow tones before use to avoid undesired hues

but will look best on hair that has been lightened to a very light level 9 blonde or lighter

to the invocation of the demon Prince Sitri

Rockabilly blue we recommend lightening hair toGUILT FREE GLAMOUR! 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.