Once she studies your hair, its condition, its style, its cut, and your lifestyle (e. g., how much time you plan on spending on your hair each day), she will then make some recommendations for color and maybe even a more suitable style for you. Plan on being there for a few hours.
But any such stigma associated with coloring our mane is long gone. Anymore it's so common no one gives it a second thought. In fact some of us would be hard pressed to recognize our own natural hair color it's been so long since we have seen it. Because as they say color is a girl's best friend.