JSFiddle - React, Tailwind, and code Playground

HTML

<div id='container'>
<h1>Heading</h1> <a class="button" href="#">Some text</a>
</div>

CSS

.your_color_class { color: red; }

JavaScript

$(document).ready(function() {
    $("a.button").hover(function() {
        $(this).siblings("h1").addClass("your_color_class");
    }, function() {
        $(this).siblings("h1").removeClass("your_color_class");
    });
});