线性渐变：ie6以下不兼容
径向渐变：只支持firefox、Chrome和Safari
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html" charset="utf-8" />
<title>Background Color</title>
<style type="text/css">
* {
marigin:0;
padding:0;
}
div{
margin-bottom:20px;
width:300px;
height:100px;
}
.linear{/*线性渐变样式*/
background-color: #1FA9F4; /* Old browsers */
background-image: -moz-linear-gradient(top,#1FA9F4 0%, #001C4E 100%); /* FF3.6+ */
background-image: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#1FA9F4), color-stop(100%,#001C4E)); /* Chrome,Safari4+ */
background-image: -o-linear-gradient(top,#1FA9F4 0%, #001C4E 100%); /* Opera 11.10+ */
background-image: -ms-linear-gradient(top,#1FA9F4 0%, #001C4E 100%); /* IE10+ */
background-image: linear-gradient(to bottom,#1FA9F4 0%, #001C4E 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#1FA9F4', endColorstr='#001C4E',GradientType=0 ); /* IE6-8 */
}
.circle{/*径向渐变样式*/
background-color: #1FA9F4; /* Other browsers*/
background-image:-moz-radial-gradient(center 80px 45deg, circle farthest-corner, #1FA9F4 0%, #001C4E 100%); /* FF3.6+ */
background-image: -webkit-gradient(radial,50% 100%,10,50% 50%,90,from(rgba(31,169,244,1)),to(rgba(0,28,78,1))); /* Chrome,Safari4+ */
}
</style>
</head>
<body>
<div class="linear">
</div>
<div class="circle">
</div>
</body>
</html>
注意：background-image 可以写 background
我自己在网页中写的径向渐变兼容代码 ：firefox、chrome、IE10、IE10+、safari（background-image老式写法）兼容
background: rgb(98, 37, 140);
background:-webkit-radial-gradient(circle at top, rgb(160, 114, 193),rgb(98, 37, 140));
background-image: -webkit-gradient(radial,50% 0%,0,50% 55%,90,from(rgb(160, 114, 193)),to(rgb(98, 37, 140)));/* Safari 4-5, Chrome 1-9 */
background:radial-gradient(circle at top, rgb(160, 114, 193),rgb(98, 37, 140));
background:-moz-radial-gradient(circle at top, rgb(160, 114, 193),rgb(98, 37, 140));
background:-ms-radial-gradient(circle at top, rgb(160, 114, 193),rgb(98, 37, 140));
线性渐变兼容代码 ：firefox、chrome、IE10、IE10+、safari兼容
background: rgb(247, 100, 14);
background:-webkit-linear-gradient(top, rgb(251, 121, 46) ,rgb(247, 100, 14));/* safari,chrome*/
background:linear-gradient(top, rgb(251, 121, 46) ,rgb(247, 100, 14));
background:-moz-linear-gradient(top, rgb(251, 121, 46) ,rgb(247, 100, 14));
background:-ms-linear-gradient(top, rgb(251, 121, 46) ,rgb(247, 100, 14));
附图
径向
线性