<!doctype html>
<!DOCTYPE html>
<html>
<head>
  <title></title>
</head>
<body>
  <h3>The background is blue-violet</h3>
</body>
</html>
body {
  background-color: blueviolet;
}

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.