试试这个:JS Fiddle
#test {
/* IE10 Consumer Preview */
background-image: -ms-linear-gradient(left, #6E6E6E 25%, #F20000 25%, #F20000 50%, #FFFF21 50%, #FFFF21 75%, #1231FF 75%);
/* Mozilla Firefox */
background-image: -moz-linear-gradient(left, #6E6E6E 25%, #F20000 25%, #F20000 50%, #FFFF21 50%, #FFFF21 75%, #1231FF 75%);
/* Opera */
background-image: -o-linear-gradient(left, #6E6E6E 25%, #F20000 25%, #F20000 50%, #FFFF21 50%, #FFFF21 75%, #1231FF 75%);
/* Webkit (Safari/Chrome 10) */
background-image: -webkit-gradient(linear, left top, right top, color-stop(.25, #6E6E6E), color-stop(.25, #F20000), color-stop(.5, #F20000), color-stop(.5, #FFFF21), color-stop(.75, #FFFF21), color-stop(.75, #1231FF));
/* Webkit (Chrome 11+) */
background-image: -webkit-linear-gradient(left, #6E6E6E 25%, #F20000 25%, #F20000 50%, #FFFF21 50%, #FFFF21 75%, #1231FF 75%);
/* W3C Markup, IE10 Release Preview */
background-image: linear-gradient(to right, #6E6E6E 25%, #F20000 25%, #F20000 50%, #FFFF21 50%, #FFFF21 75%, #1231FF 75%);
}
在此处创建:http://ie.microsoft.com/TEStdrive/Graphics/CSSGradientBackgroundMaker/Default.html