JSFiddle - React, Tailwind, and code Playground

HTML

<p>
First paragraph without class
</p>
<p class="my-class">
First paragraph with class
</p>
<p class="my-class">
Second paragraph with class
</p>
<p class="my-class">
Third paragraph with class
</p>

CSS

.my-class:not(.my-class ~ .my-class) {
  background: red;
}