 <p>Given that the site you linked to adds the ID to the body based on the page that you are on, your css is fine (although, you have a trailing comma before the open bracket that should be removed); it's the hex code on your background color that is invalid. You have 7 characters when there should only be 6: #FFD3CEf</p> <p>Generally speaking, the best way to handle special styles on the active page link is just to add a class (ex. "active") to the link that corresponds with the current page you are on, and then apply the special styles to that .active class in your css.</p>