Lighten Your Hair Color
You can use hydrogen peroxide to lighten hair either on its own or combined with other blonde dyes. The dyes that come with peroxide are considered permanent, and that means that the color only goes away when you have new growth.
On its own, peroxide can lighten darker locks before incorporating a lighter dye shade. For instance, if you want to go from a natural jet black to medium blonde, you can use peroxide and baking soda as an intermediary to help the color carry the new hue well. You can also mix it with shampoo, and it should lighten your mane in a few washes.