JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
    <li>this is 1.1</li>
    <li>this is 1.2</li>
    <li>this is 1.3</li>
    <li>this is 1.4</li>
    <li>this is 1.5</li>
    <li>this is 1.6</li>
</ul>
<ul>
    <li>this is 2.1</li>
    <li>this is 2.2</li>
    <li>this is 2.3</li>
</ul>
<ul>
    <li>this is 1.1</li>
    <li>this is 1.2</li>
    <li>this is 1.3</li>
    <li>this is 1.4</li>
    <li>this is 1.5</li>
</ul>
<ul>
    <li>this is 3.1</li>
    <li>this is 3.2</li>
    <li>this is 3.3</li>
    <li>this is 3.4</li>
</ul>

CSS

li:first-child:nth-last-child(n+5) {
    color: red;
}