JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>ho</li>
    <li>ho</li>
    <li>ho</li>
    <li>ho</li>
    <li>ho</li>
</ul>

CSS

li { color: blue }
li:nth-child(odd) { color:green }
li:nth-child(even) { color:red }