<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
.one{
width: 0;
height: 0;
border-style: solid;
border-top-width:20px;
border-bottom-width:20px;
border-left-width:100px;
border-right-width:100px;
border-color:#2d15b6 #dddddd #771515 #168314; //上右下左 需要哪个边进行修改即可
}
</style>
</head>
<body>
<div class="one"></div>
</body>
</html>
