Using Violet Dream hair colour is easy. First, make sure to do a patch and strand test at least 48 hours before you plan to colour your hair. This helps you check for any allergic reactions. If you have darker hair, it's best to pre - lighten it to around level 7 or lighter for the best results. Mix the hair colour according to the instructions. Apply it evenly to clean, dry hair, starting from the roots and working your way down to the ends. Leave it on for the recommended time, then rinse it out thoroughly with cool water until the water runs clear. After that, you can use a conditioner. Remember, this is a semi - permanent colour, so it will fade over time. To keep the colour vibrant, use a colour - safe shampoo and conditioner. Avoid washing your hair too often, and stay away from hot tools as much as possible. Also, keep in mind that the colour will generally fade into a pink shade, so embrace the changing look!