JSFiddle - React, Tailwind, and code Playground

HTML

<h6>Brand</h6>

<ul>
    <li>Orange</li>
    <li>Black</li>
    <li>Green</li>
</ul>

<h6>Colour</h6>

<ul>
    <li>Green</li>
    <li>Blue</li>
    <li>Black</li>
    <li>Orange</li>
</ul>

JavaScript

$("h6:contains('Colour')+ ul li:contains('Black')").text('Purple');