Bat Outta Hell is a dark, espresso brown hair dye with warm undertones. This shade is here to stand out and be taken seriously! For best results use on pre-lightened hair or add to your current natural light brown hair for added pigment and intensity! All semi permanent hair dyes work best on pre-lightened hair. Always do a strand test to make sure this color will work well on your current base color! How many 4oz containers of Manic Panic hair colour should I buy? Short Hair up to Bob Length: 1 jar/bottle for thin or thick hair. Below the Shoulder up to Waist Length: 2 jars/bottles for thin hair and 2-3 for thick hair. Tailbone or Longer: 3 or more jars for thin or thick hair. Details: Style: Classic Semi-Permanent Hair Dye Color: Tiger's Eye Color Description - Copper Brown Hair Dye Volume: 4oz / 118ml Ingredients: Vegan Friendly, PPD Free! Additional Features: Benefits of Conditioning Hair, Resealable Tub For Longer Use, Comes With Instructions Duration: 4 - 6 weeks For Best Results: See Instructions Tab Please Note: We recommend that you patch test any new product before its continued usage. If any redness or itching occurs do not continue use. MANIC PANIC