JSFiddle - React, Tailwind, and code Playground

HTML

<div class="a">
</div>
<div class="b">
  Green
</div>
<div class="c">
</div>
<div class="d">
</div>
<div class="e">
  Red
</div>

CSS

.b {
  color: green;
}

:is(.a~.d+.e, .a+.b) {
  color: red;
}