Harvestmoon -- one more thing

My mother colours her hair to a close approximation of my natural colour. She's starting with about 25% white hair, so you'd have to take into account what your starting colour is.

Anyway, I found out what she uses. She starts with Herbal Essences #61.7 Hot Chestnut -- Medium Spiced Brown. Then, she gets a friend to do a few foils with #29 Apricot Rapture -- Dark Spiced Blonde for highlights. Her results are very natural-looking.

Hope this helps you.