<h1>Select some text on this page:</h1>

<p>This is a paragraph.</p>
<div>This is some text in a div element.</div>

<p><strong>Note:</strong> ::selection is not supported in Internet Explorer 8 and earlier versions.</p>
<p><strong>Note:</strong> Firefox supports an alternative, the ::-moz-selection property.</p>

::-moz-selection { /* Code for Firefox */
    color: red;
    background: yellow;
}

::selection {
    color: red;
    background: yellow;
}