4 fl oz / 118 ml (Classic and Amplified contain the same amount of dye regardless of its packaging - jar or bottle.) Manic Panic Hair Color is ready to use, do not mix with peroxide. Cream Formula Semi-Permanent Hair Color - Conditions hair - Vegan ingredients - PPD and ammonia-free - Made in the USA The dye may add slight blue tint to virgin, unbleached hair. More vivid, dark blue color results are best achieved by applying to hair that has been lightened to level 9 very light blonde and ideally pre-toned. Toning hair prior coloring helps prevent unwanted hues. Manic Panic's Amplified™ formula of the semi-permanent hair color lasts 30% longer than Manic Panic High Voltage® Classic hair color. The name and color is the same, but the Amplified version will stay in hair brighter longer. #manicpanic #classic #amplified #aftermidnight #blue #bluehair