JSFiddle - React, Tailwind, and code Playground

HTML

<div id="box1" class="one">
  <div id="box2" class="two">
    <div id="box3" class="three"> Jartto's blog </div>
  </div>
</div>

CSS

.one .two div { color : red; }
div #box3 { color : yellow; }
#box1 div { color : blue; }