Using Aurora Green hair dye is easy. First, if you want the most vibrant color, bleach your hair until it's a pale yellow to platinum shade. Make sure the bleaching is even. Before applying the dye all over, do a strand test because the color in the bottle can look different on your hair. Once you're ready, apply the dye following the normal hair - dye application process. This semi - permanent dye doesn't need a developer and is non - damaging. After application, let it sit for the recommended time. To maintain the color, use color - safe shampoos and conditioners. Avoid excessive exposure to sunlight and chlorine as they can fade the color. If you have dark or previously dyed hair and are bleaching for the first time, remember to lift your hair to an appropriate light color for the best results.