使用渐变作为背景。
body{
background: #fcfcfc; /* Old browsers */
background: -moz-linear-gradient(left, #fcfcfc 30%, #6b1717 30%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, right top, color-stop(30%,#fcfcfc), color-stop(30%,#6b1717)); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(left, #fcfcfc 30%,#6b1717 30%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(left, #fcfcfc 30%,#6b1717 30%); /* Opera 11.10+ */
background: -ms-linear-gradient(left, #fcfcfc 30%,#6b1717 30%); /* IE10+ */
background: linear-gradient(to right, #fcfcfc 30%,#6b1717 30%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#fcfcfc', endColorstr='#6b1717',GradientType=1 ); /* IE6-9 */
}
使用生成的渐变:http: //www.colorzilla.com/gradient-editor/
演示:http: //jsfiddle.net/guE5L/