JSFiddle - React, Tailwind, and code Playground

HTML

<form>
  <input type="radio" id="m" name="gender" value="male" checked>
  <label for="m">male</label>
  <input type="radio" id="f" name="gender" value="female">
  <label for="f">female</label>
</form>

CSS

input:checked + label{
   background:red;
 }