I received the snippet of hair back from the salon. The suggestion was made I use 2 parts light auburn and 1 part med brown. I have no colored my hair since november because it was so dark at that time. It has since faded out--with some brassiness to the top layer. Bottom layer is fine. I do have regrowth that is coming in dark and I have less than 5% grey showing at the roots. How to I apply the color and will this color make me brassier? How long does an order take to be shipped? Can I just do the roots and pull through the rest of my hair? Thanks for your help.