JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
		<div class="center">
			<div class="item-1 item">Item 1</div>
			<div class="item-2 item">Item 2</div>
			<div class="item-3 item">Item 3</div>
			<div class="item-4 item">Item 4</div>
			<div class="item-5 item">Item 5</div>
			<div class="item-6 item">Item 6</div>
		</div>
	</div>

CSS

.container {
	display: flex;
	justify-content: center;
}

.center {
	display: flex;
	flex-wrap: wrap;
}

/* ================================= 
  Page Styles
==================================== */

* {
	box-sizing: border-box;
}
body {
	font-size: 1.35em;
	font-family: 'Varela Round', sans-serif;
	color: #fff;
	background: #e8e9e9;
	padding-left: 5%;
	padding-right: 5%;
}
.container {
	padding: 10px;
	background: #fff;
  border-radius: 5px;
	margin: 45px auto;
  box-shadow: 0 1.5px 0 0 rgba(0,0,0,0.1);
}
.item {
	color: #fff;
	padding: 15px;
	margin: 5px;	
	background: #3db5da;
	border-radius: 3px;
}