// more info @ http://www.w3schools.com/svg/svg_polygon.asp
<svg version="1.1" xmlns="http://www.w3.org/2000/svg" width="100%" height="100%" viewBox="0 0 1920 72" xml:space="preserve" preserveAspectRatio="none">
<polygon fill="#FFFFFF" points="0,0 0,72 1920,72 "></polygon>
</svg>