Why People Dye Their Hair to Match Their Skin Color

Yes Jessica Alba, I'm talking to you.

This one I really don't understand. Why dye your hair a color that's similar to your skin color? In my opinion, it just kind of makes you look washed out. (Lindsay, I hope you're taking note. Go back to being a redhead please.) In any case, I don't really have anything witty to say about this one. I'm just genuinely confused.