Step 3: Change the background color of the page by going to style.css, and adding the following:

body {
  background-color: blue;
}

The first line specifies what to style, and is called a selector. In this case, the body tag, which represents the entire page, is styled. The part between the curly brackets specifies how to style the thing that is selected. In this case, a background-color style is used. Feel free to pick a different color.