Once you can see at least an inch of the roots, use a semi-permanent hair dye, at least one shade lighter than your roots, to color your hair. Instead of dyeing all the hair at once, dye one side at a time so that you achieve the color you desire. After following the directions to remove the dye, dry your hair to check the color. If you are satisfied with the results, add shampoo to the remaining semi-permanent hair color and work it throughout your hair. This will ensure the roots and ends match, and allow for your natural color to continue growing in seamlessly.