JSFiddle - React, Tailwind, and code Playground

by each

HTML

<div><span></span></div>

CSS

div {
    position: relative;
    width: 100px;
    height: 25px;
    background: red;
    margin: 50px 0 0 50px;
    display: inline-block;  
}

span {
    border: 7px solid transparent;
    border-top-color: red;
    position: absolute;
    bottom: -14px; left: 50%;
    margin: 0 0 0 -7px;
    display: block;
}