I've been using Natural Instincts to color my roots for a long time now. I have always used medium brown. Saturday I tried the medium golden brown all over and it gave me auburn highlights. I just saved myself a lot of money.
From Michael Berg:

Every person has a unique connection to the Creator that can never be extinguished, and every person has a great soul that can manifest important things in our world. To make a person feel less than they are because of something inside themselves, be it faith, race, or sexual orientation, is the greatest sin of all."