Something like this?
JsFiddle
http://jsfiddle.net/r3wN8/
CSS
background: -moz-linear-gradient(top, rgba(255,255,255,0) 0%, rgba(41,137,216,1) 50%, rgba(125,185,232,0) 100%); /* FF3.6+ */
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,rgba(255,255,255,0)), color-stop(50%,rgba(41,137,216,1)), color-stop(100%,rgba(125,185,232,0))); /* Chrome,Safari4+ */
background: -webkit-linear-gradient(top, rgba(255,255,255,0) 0%,rgba(41,137,216,1) 50%,rgba(125,185,232,0) 100%); /* Chrome10+,Safari5.1+ */
background: -o-linear-gradient(top, rgba(255,255,255,0) 0%,rgba(41,137,216,1) 50%,rgba(125,185,232,0) 100%); /* Opera 11.10+ */
background: -ms-linear-gradient(top, rgba(255,255,255,0) 0%,rgba(41,137,216,1) 50%,rgba(125,185,232,0) 100%); /* IE10+ */
background: linear-gradient(to bottom, rgba(255,255,255,0) 0%,rgba(41,137,216,1) 50%,rgba(125,185,232,0) 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#00ffffff', endColorstr='#007db9e8',GradientType=0 ); /* IE6-9 */
Generated by http://www.colorzilla.com/gradient-editor/