JSFiddle - React, Tailwind, and code Playground

HTML

<fieldset>
  <div></div>
  <label>this label is red</label>
  <div>works, but not good, there must be no first div.</div>
</fieldset>

<fieldset>
  <label>this label is red</label>
  <div>doesn't work, label should be red and div comes after.</div>
</fieldset>

CSS

div ~ label {
  color: red;
}