JSFiddle - React, Tailwind, and code Playground

HTML

<h1 id="title">hola mundo</h1> 
 
<div id="uno" data-color="blue">Nananana</div> 
<div id="dos" data-color="red">Nananana</div>
<div id="tres" data-color="#aaa">Nananana</div>

<h1 id="titledos">hola mundo dos</h1> 
 
<div id="unoa" data-color="teal">Nenenene</div>
<div id="dosb" data-color="orange">Nenenene</div>
<div id="tresc" data-color="green">Nenenene</div>

JavaScript

$('div').click(function(){
    var divColor = $(this).attr('data-color');
    $(this).prevAll('h1').eq(0).css('color',divColor);
});