CSS3 教程尝试一下

安科网

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"> 
<title>安科教程(www.ancii.com)</title> 
<style>
#grad1 {
    height: 200px;
    background: -webkit-linear-gradient(red, green, blue); /* Safari 5.1 - 6.0 */
    background: -o-linear-gradient(red, green, blue); /* Opera 11.1 - 12.0 */
    background: -moz-linear-gradient(red, green, blue); /* Firefox 3.6 - 15 */
    background: linear-gradient(red, green, blue); /* 标准的语法（必须放在最后） */
}

#grad2 {
    height: 200px;
    background: -webkit-linear-gradient(red, orange, yellow, green, blue, indigo, violet); /* Safari 5.1 - 6.0 */
    background: -o-linear-gradient(red, orange, yellow, green, blue, indigo, violet); /* Opera 11.1 - 12.0 */
    background: -moz-linear-gradient(red, orange, yellow, green, blue, indigo, violet); /* Firefox 3.6 - 15 */
    background: linear-gradient(red, orange, yellow, green, blue, indigo, violet); /* 标准的语法（必须放在最后） */
}

#grad3 {
    height: 200px;
    background: -webkit-linear-gradient(red 10%, green 85%, blue 90%); /* Safari 5.1 - 6.0 */
    background: -o-linear-gradient(red 10%, green 85%, blue 90%); /* Opera 11.1 - 12.0 */
    background: -moz-linear-gradient(red 10%, green 85%, blue 90%); /* Firefox 3.6 - 15 */
    background: linear-gradient(red 10%, green 85%, blue 90%); /* 标准的语法（必须放在最后） */
}
</style>
</head>
<body>

<h3>3 个颜色结点（均匀分布）</h3>
<div id="grad1"></div>

<h3>7 个颜色结点（均匀分布）</h3>
<div id="grad2"></div>

<h3>3 个颜色结点（不均匀分布）</h3>
<div id="grad3"></div>

<p><strong>注意：</strong> 当未指定百分比时，颜色结点不会自动均匀分布。</p>
<p><strong>注意：</strong> Internet Explorer 9 及之前的版本不支持渐变。</p>

</body>
</html>