JSFiddle - React, Tailwind, and code Playground

HTML

<div>
    <div>
        <div>
            <h3>first</h3>
        </div>
    </div>
</div>
<div>
    <h3>second</h3>
</div>
<div>
    <h3>third</h3>
</div>

CSS

body h3:first-of-type{
    color:red;
}