Customize the background color of the overlay by the attribute of target.

        <div class="demo" id="container">
            <ul>
                <li>
                    <a href="#"><img src="img/1.jpg" data-background="rgba(120,100,240,0.85)" /></a>
                </li>
                <li>
                    <a href="#" >
                    <img src="img/2.jpg" data-background="rgba(140,100,180,0.85)" />
                    </a>
                </li>
                ...
            </ul>
        </div>

        $(function() {

            $('#container').sliphover({
                backgroundColorAttr: 'data-background'
            });

        })