This denim blue hair dye, Bad Boy Blue, is perfect for baby blue locks with an edgy touch. Just like the trendy rocker Gwen Stefani, who flaunted this hair dye on the red - carpet of the MTV Video Music Awards! It has green and grey undertones. To get the best results, lighten your hair to a very light level 9 blonde or lighter. If your hair has yellow tones, tone it before use to avoid unwanted hues. The Amplified formula is a semi - permanent hair color that lasts 30% longer than our High Voltage Classic color. It comes in many of our top - selling shades. This cream - formula semi - permanent hair color is vegan. It not only colors but also conditions your hair. Manic Panic Hair Color is a conditioning semi - permanent hair color. It's fortified with a herbal and protein complex, restores processed hair, adds moisture, and doesn't damage your hair. It contains no animal by - products, is not tested on animals, and is 100% Vegan. Weight: 4 fl. oz / 118ml. Photos are from the Manic Panic Website. Please note: patch - test any new product before continued use. If you experience redness or itching, stop using it.






To use this Bad Boy Blue hair dye, first lighten your hair to a very light level 9 blonde or lighter. If your hair has yellow tones, tone it before applying the dye to avoid unwanted colors. Apply the cream - formula semi - permanent hair color evenly on your hair. Leave it on for the recommended time according to your hair's condition. Rinse thoroughly. Before using it regularly, always do a patch test on a small area of your skin. If you notice any redness or itching during the patch test, don't use the product. To maintain the color, use a color - protecting shampoo and conditioner. Avoid excessive sun exposure as it can fade the color faster. Also, try not to wash your hair too frequently to keep the color vibrant for longer.