JSFiddle - React, Tailwind, and code Playground

HTML

<body>
    <div></div>
    <div class="hi"></div>
    <div id="hi1"></div>
</body>

CSS

div {
    height: 100px;
    width: 100px;
    background-color: red;
}
body > div:not([class]):not([id]) {
    background-color: blue;
}