JSFiddle - React, Tailwind, and code Playground

HTML

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

CSS

.grey-footer-background {
  background-color: #a8a7a5;
  height: 70px;
  border-bottom: 1px black solid;
  padding: 0;
  display: table;
  height: 100px;
  width: 100%;
  table-layout: fixed;
}
.gold_button {
  background-color: gold;
  -webkit-box-sizing: border-box;
  -moz-box-sizing: border-box;
  box-sizing: border-box;
  font-weight: bold;
  text-align: center;
  width: 80%;
  height: 60px;
  vertical-align: middle !important;
    
  
  line-height:60px;
  border: 1px solid black;
  margin: 20px auto;
}