The actress, spotted here leaving a Hollywood restaurant on September 1, 2009, is the antithesis of the high-maintenance Hollywood blond.
According to celebrity colorist Eva Scrivo, "Depending on skin tone, a rich brunette has the choice between being a warm brown with red under tones, a neutral brown that tends to be more ash, or a brunette with cool under tones which tend to have a base of violet."
Sophia's skin has a pink undertone that looks great against her warm red-brown color.
With stars like Britney Spears, Lindsay Lohan, Kim Kardashian, Katharine McPhee, and Miranda Kerr all recently going lighter, we're glad to see someone embracing the natural look.
Learn more about getting gorgeous hair right here.