Mistake #5: You have a deep, dark hair color.
Solid black or brown hair can highlight shadows on the face, drawing attention to lines and bags. If you're fair-skinned, a dark hair color also accentuates the contrast between your hair and scalp, which makes thinning more noticeable. A few highlights around the face and at the crown of the head add softness and make a dark hair color appear more natural. "You don't want to look like you're wearing a wig," says Chiccine. Her rule of thumb: Don't dye your hair as dark as it was in your teens and 20s; a shade or two lighter will be more flattering in your 30s and beyond.