JSFiddle - React, Tailwind, and code Playground

HTML

<div class="col">
A
</div>
<div class="separador">
</div>
<div class="col">
B
</div>
<div class="separador">
</div>
<div class="col">
C
</div>

CSS

.col{
	width:100px;
	height:250px;
	display:inline-block;
	background-color:#00437B;
	margin-left:15px;
	position:relative;
	padding:25px;
	color:#fff;
}
.separador{
	width:1px;
	height:300px;
	display:inline-block;
	background-color:#FF6E00;
	margin-left:5px;
	position:absolute;
}