At the store colors will be numbered 1 - 10, referring to the levels mentioned earlier. After you decide what shade you'd like, you'll notice there colors usually have a letter following the number. This is
referring to the undertones of the haircolor, and can help you be more specific with shades. For warmer shades, look for "G" for Golden or "R" for Red. For cooler shades, look at "N" for Nuetral, "V" for Violet, "B" for Blue or "A" for Ash.