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.
In any case, it's certainly true that coloring your locks can change the way you look. It can revitalize things taking them from boring to fresh and new. Which is why so many of us have wholeheartedly embraced coloring our locks. You just want to make sure the change is for the better.