JSFiddle - React, Tailwind, and code Playground

HTML

<div class="ou">
        <button class="con">some</button>
</div>

CSS

.ou{
    width: 33%;
    height: 26px;
    background: blue;
}

.con{
    height: 100%;
    width: 100%;
}


.con button{
    width: 50px;
    background: red;
    margin: 0 auto;
    display:block;
}