@Baronvonbbqsauc:
Sorry, I just noticed the theme changes are only available for Basic or Ease of Access themes. If you're using Aero it doesn't seem like you can adjust stuff like header fonts, border size, that kind of thing. You could try looking at the Ease of Access options though. It's the bottom-most link on the lefthand side of the Personalization screen, the area marked "See also".