If you want color added to your hair without the use of dye, you can try the koolaid method. I don't recommend doing this all the time though. You mix purple koolaid into a cup of hot/boiling water. Use one pack for every cup. Depending on your length, you may only need one. After it has cooled to just warm temps, dip the tips of your hair into the koolaid. Finish off by rubbing it into the roots. Let this soak onto your hair for a good 30 minutes then rinse with an oil based conditioner. This will give your dark hair a dull purple tint.