<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.icon {
display: inline-block;
20px;
height: 20px;
overflow: hidden;
}
.icon-del {
background:url("卡包.png") no-repeat center;
background-size: 20px 20px;
}
.icon>.icon {
position: relative;
left: -20px;
border-right: 20px solid transparent;
-webkit-filter: drop-shadow(20px 0 blue);
filter: drop-shadow(20px 0 blue);
}
</style>
</head>
<body>
<p><strong>原始图标</strong></p>
<i class="icon icon-del"></i>
<p><strong>可以变色的图标</strong></p>
<i class="icon"><i class="icon icon-del"></i></i>
</body>
</html>
效果：
知识点传送门：http://www.zhangxinxu.com/wordpress/2016/06/png-icon-change-color-by-css/
http://www.zhangxinxu.com/study/201606/png-icon-color-fill.html