JSFiddle - React, Tailwind, and code Playground
HTML
<div class="box">
</div>
CSS
* {
box-sizing: border-box;
}
.box {
margin: 100px;
background: #222;
position: relative;
width: 200px;
height: 67px;
}
.box::after {
content: '';
display: block;
background: lightblue;
position: absolute;
width: 24px;
height: 100%;
top: 0;
right: 0;
transform: skew(-20deg);
transform-origin: left bottom;
}