JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li>Teste1</li>
  <li>Teste2</li>
  <li>Teste3</li>
  <li>Teste4</li>
  <li>Teste5</li>
  <li>Teste6</li>
  <li>Teste7</li>
  <li>Teste8</li>
  <li>Teste9</li>
</ul>

JavaScript

var cores = ['red', 'blue', 'green'];
    $('li').each(function(index, value) {
        $(this).css('color', cores[index % 3]);
    });