<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Reference</title>
<style>
    .blue {
        background: blue;
    }
</style>
<body>
    <p>Test passes if there are three lines of "Filler Text" below and the middle line has a blue background.</p>
    <div>Filler Text</div>
    <div class="blue">Filler Text</div>
    <div>Filler Text</div>
</body>
