Photo: Jupiterimages/Photos.com/Getty Images
If you're looking to turn your dyed-blond hair to a more wild and crazy violet and brown, you have an easier road to tread than people who are starting out with dark hair. Since your hair is already bleached, it's going to take the new color fairly easily. But just how long your new color will last will depend on whether you choose permanent or semipermanent hair dye.
Choose a hair dye that suits your needs and is the color you want to use. Since violet is a fairly extreme color, you'll probably find the largest selection of dyes in that color from wild hair-dye manufacturers such as Jerome Russell Punky, Manic Panic or Special Effects Hair Dye. If you can't find the exact mixture of brown and violet that you're looking for, you could combine two dyes -- but in that case, only use two dyes from the same manufacturer. Both should also be either permanent or semipermanent as well. Read the instructions -- and any posted side effects or warnings -- carefully to determine whether the product is something you feel safe using on your locks. Some products may not be recommended for hair that is already bleached or hair that has certain products already on it, so use your best judgment for what works well with your hair.
Shampoo your hair and let it dry. You may have heard that you're supposed to let your hair be dirty before you dye it, but according to Jerome Russell's Punky Colour instructions, you must wash your hair before you dye it.
Section your hair off into several smaller sections using hair clips.
Apply petroleum jelly around your scalp and on the tops of your ears to keep the dye from coloring your skin. Wrap an old towel around your shoulders to protect your clothing.
Mix the hair dye according to the manufacturer's instructions. If you've chosen two colors to mix, combine them and mix well.
Test the dye on one section of your hair and wait for the amount of time recommended by the dye's manufacturer. You want to make sure the color is right and that your hair is not going to have a serious reaction the particular brand you are using. Once you've waited the required amount of time, rinse that section and check the color. If you're happy with the product, move on.
Apply the dye to each section of your hair one-by-one using the application brush that came with your dye kit. If you can, get the help of a friend to apply the dye to sections of the hair you can't see well.
Rinse out a small strand of your hair after the recommended amount of time to see if you've achieved the color you want. If not, wait a bit longer to deepen the color, and then rinse with warm water.
Condition your hair if recommended by the dye manufacturer. In some cases, such as with the Jerome Russell products, conditioning is not recommended.
Along with a strand test, some manufacturers, such as Manic Panic, also recommend doing a skin test 24 hours before you apply the dye to your head. If you have sensitive skin, test the dye on a small portion of your skin before you do your whole head.
If any dye spills onto your skin, wipe it with a warm cloth right away or it may stain your skin.