Hair dye. They make home highlighting kits that are, for the most part, reliable. You can buy them at most drug stores or supermarkets. Since you have dark hair, you will get the best results by using a demi-permanent or permanent dye, as opposed to a semi-permanent dye that will not be able to lift your dark color as well. Most colors will come in a warm, neutral, or ash tone. Neutral and ash tones are less likely to turn your hair orange.