<!DOCTYPE html>

<html>
<head>
    <style>
        .box {
            margin: 20px;
            height: 150px;
            width: 200px;
            -webkit-clip-path: path("M100,40l20,0 0,60 20,0 0,-20 -60,0 0,-20 80,0 0,60 -60,0 0,-80z");
            background-color: blue;
        }
        
        .box.evenodd {
            -webkit-clip-path: path(evenodd, "M100,40l20,0 0,60 20,0 0,-20 -60,0 0,-20 80,0 0,60 -60,0 0,-80z");
            background-color: green;
        }
    </style>
</head>
<body>

<div class="box"></div>
<div class="evenodd box"></div>

</body>
</html>