JSFiddle - React, Tailwind, and code Playground

HTML

<div class="grey-footer-background">
    <div class="gold_button"><span>Email</span>

    </div>
</div>

CSS

.grey-footer-background {
    background-color: #a8a7a5;
    border-bottom: 1px black solid;
    padding: 10px 0;
    width: 100%;
}
.gold_button {
    display: table;
    table-layout: fixed;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    font-weight: bold;
    text-align: center;
    border-right: solid 1px #262626;
    width: 80%;
    border: 1px solid black;
    margin: 0 auto;
    background-color:gold;
}
.gold_button span {
    display: table-cell;
    vertical-align: middle !important;
    height: 60px;
}