Jquery本身不支持变色，Jquery Color.js弥补了这缺陷并为animate动画赋予变色效果，如下红变蓝后执行回调再由蓝变红。
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title></title>
<style>
#box {
width:100px;
height:100px;
background-color:red;
cursor:pointer;
}
</style>
</head>
<body>
<div class="box" id="box"></div>
<script type="text/javascript" src="/js/jquery-1.8.3.min.js"></script>
<script type="text/javascript" src="/js/jquery.color.js"></script>
<script type="text/javascript">
$(document).ready(function () {
$("#box").mouseenter(function () {
$(this).stop(true, true).animate({ "backgroundColor": 'blue' }, 5400, function () {
$(this).animate({ "backgroundColor": 'red' }, 5400);
});
});
});
</script>
</body>
</html>
支持的其他属性如下
backgroundColor, borderBottomColor, borderLeftColor, borderRightColor, borderTopColor, color, columnRuleColor, outlineColor, textDecorationColor, textEmphasisColor