chamomile tea

Chamomile tea will not color your hair, but it can bring out highlights. Tea bags don't work as well as buying chamomile in bulk, because companies tend to add other herbs into their tea as well. You can buy chamomile in bulk at healthfood stores.

Another easy way to bring out highlights is to use lemon juice. For both chamomile and lemon juice, don't expect a drammatic change. They will not MAKE highlights-- they only BRING OUT highlights by making your hair shinier and slightly (very slightly) yellow-tinted.

For a more drammatic change, you can try natural henna. Healthfood stores carry henna in various colors, so you can choose which one you like best.

Good luck,
PD

Personally, I have never used henna. But I know one woman who has. Henna makes her hair much thicker and stronger, but also dryer. If I were you, I wouldn't use henna on all of the hair, otherwise it might become coarse. But I think a few highlights would be fine-- way safer than a whole head of hair. Besides, compared to all of the chemical and unnatural hair dyes, I think henna is by far a safer product.

If you try henna, I would suggest doing a good, long moisturizing treatment before coloring/highlighting...and probably another moisturizing treatment right after, too.

Good luck,
PD