JSFiddle - React, Tailwind, and code Playground
HTML
<div class="midd">
<img class="cent" src="images/linkin.gif" width="30px" height="30px">
</div>CSS
.midd {
width: 300px;
display: table-cell;
text-align: center;
vertical-align: middle;
height: 300px;
border: 1px solid black;
background: #a6b7d2;
}