JSFiddle - React, Tailwind, and code Playground

HTML

<html lang="en">
<head>
  <meta charset="utf-8">
  <title>dialog demo</title>
  <link rel="stylesheet" href="//code.jquery.com/ui/1.10.4/themes/smoothness/jquery-ui.css">
  <script src="//code.jquery.com/jquery-1.10.2.js"></script>
  <script src="//code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
</head>
<body>
 
<button id="opener">open the dialog</button>
<div id="dialog" title="Dialog Title">I'm a dialog</div>
 
<script>
$( "#dialog" ).dialog({ autoOpen: false,
    dialogClass: 'myTitleClass'});
$( "#opener" ).click(function() {
  $( "#dialog" ).dialog( "open" );
});
</script>
 
</body>
</html>

CSS

.myTitleClass .ui-dialog-titlebar {
    background:red;
}