JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
	<li class"stp" >List 1</li>
	<li>List 2</li>
    <li>List 3</li>
    <li>List 4</li>
	<li>List 5</li>
</ul>

CSS

ul li{
    color:red;
}
ul li:last-child{
    color:green;
}

.stp > ul li:(-n+3){
    color:green;
}