According to In Style magazine, the key to picking a new hair color is to choose one that is appropriate for your skin tone. Study your hair and skin in natural light to choose the right color.
New color choices should stay within two to three shades of the natural hair color. Look at eyebrow color to help choose a color that looks natural. Fair skin should never be paired with hair darker than medium brown. Ashy tones look good with porcelain skin and blue or green eyes. Women with olive skin should try warm brown hair colors with golden tones. When possible, try a temporary tint to see how it looks before committing to permanent or semi-permanent color.