JSFiddle - React, Tailwind, and code Playground

HTML

<div class='a'>
dasdsa
  <div class='b'>
  dsadas
    <div class='a'>
      dsadasdas
       <div class='b'>
        dsadadasd
      </div>
    </div>
  </div>

</div>

CSS

.a :not(.b){ color: red;}
.b{ color: green;}