Tish & Snooky’s Manic Panic Rockabilly BlueRockabilly Blue Hair Dye Color; Our Strongest True Neutral Blue Hair Dyes. This Vibrant Ultra Powerful Blue Leaves Cool Tones On Virgin Unbleached Hair; We Recommend Lightening Hair To A Light Level Nine Blonde Before UseMixable Colors And Tones; MANIC PANIC Hair Colors Are Safe To Mix To Create Custom Shades Making The Possibilities Of Shades Endless; Combine Any Formula With The Pastelizer To Create Soft Trendy Pastel Hues; Ready To Use No Developer Required