JSFiddle - React, Tailwind, and code Playground

HTML

<figure></figure>

CSS

figure{
    width:320px;
    height:64px;
    background:blue; 
    position:relative;
    margin:40px auto;
}

figure:before{
    content: '';
    position: absolute;
    left: -60px;
    width: 100px;
    height: 100%;
    background-image: linear-gradient(32deg, transparent 50%, blue 0%),linear-gradient(147deg, transparent 50%, blue 0%);
}