JSFiddle - React, Tailwind, and code Playground

by anothernick

HTML

<div class='wrap'>
    <div class='bow'><div class='inner'></div></div>
</div>

CSS

.wrap{
    width: 100px;
    margin: 40px auto;
    position: relative;
}
.bow{
    width: 50px;
    height: 50px;
    background-color: #00FF00;
    border-radius: 25px;
    position: absolute;
}
.inner{
    position:relative;
    height:100%;
    width: 100%;
    border-radius: 25px;
    box-shadow: inset 0 2px 0 #FFF, inset 2px 0 0 #FFF, inset -2px 0 0 #FFF, inset 0 -2px 0 #FFF,
        0 2px 0 #00ff00, 0 -2px 0 #00ff00, 2px 0 0 #00ff00, -2px 0 0 #00ff00,
        inset 0 3px 0 rgba(255,255,255,.8);
    z-index: 20;
}
.bow:before{
    content: '';
    height: 0;
    width: 0;
    position: absolute;
    border-left: 100px solid #00ff00;
    border-top: 35px solid transparent;
    border-bottom: 35px solid transparent;
    border-right: 0 solid transparent;
    left:-50px;
    top: -8px;
}
.bow:after{
    content: '';
    height: 0;
    width: 0;
    position: absolute;
    border-right: 100px solid #00ff00;
    border-top: 35px solid transparent;
    border-bottom: 35px solid transparent;
    border-left: 0 solid transparent;
    right:-50px;
    top: -8px;
}