In fact, as long as your clip-in hair extensions are made of human hair, you can color them. Artificial hair cannot be successfully colored. First, you should choose a color. Next, organize your workspace and mix color. Then, apply the color by using gloved hands and a color brush. After you have applied color to each section of your extensions, loosely cover them with plastic wrap to prevent the color from drying out. Then, you should rinse the color from your extensions using cool water at low pressure. Finally, comb clip-in hair extensions with your wide tooth comb, and lay the extensions out and allow them to air-dry.