JSFiddle - React, Tailwind, and code Playground
HTML
<div data-color="red">
<h1>red</h1>
</div>
<div data-color="blue">
<h1>blue</h1>
</div>
<div data-color="blue">
<h1>blue</h1>
</div>CSS
[data-color="red"] h1 {
background-color:red;
}
[data-color="blue"] h1 {
background-color:blue;
}