JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div>div 1</div>
    <div>
        div 2
        <div>div 2.1</div>
        <div>div 2.2</div>
    </div>
</body>

CSS

div {
    background: white;
}

body > div:nth-of-type(1) {
    background: red;
    color: white;
}

body > div:nth-child(2) {
    background: blue;
}