<!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>
#box {
width: 200px;
height: 20px;
background: linear-gradient(to right, #1b76bf 50%, transparent 50%);
background-size: 5px 20px;
transform: skewX(333deg);
}
</style>
</head>
<body>
<div id="box"></div>
</body>
</html>
如下图：
Document