Using this Lunar Tides Citrine Yellow hair dye is easy. First, if you want the most vibrant color, bleach your hair to a pale yellow to platinum shade. Make sure your hair is evenly bleached. Before applying the dye all over, do a strand test because the color in the bottle might look different on your hair. Once you're ready, apply the dye following the instructions on the package. Since it's a semi - permanent dye and non - damaging, you don't need to use a developer. After application, wait for the recommended time and then rinse it out. To keep the color looking great, avoid washing your hair too frequently with hot water. Also, use color - safe shampoos and conditioners. Remember, the original color of your hair will affect the final shade, with platinum hair showing the color at its best, but it can also work on light and pale yellow tones.