JSFiddle - React, Tailwind, and code Playground

HTML

<div style="background-color: red">
    <p id="target">I'd like to know that the background-color here is red</p>
</div>

JavaScript

function getBackground(jqueryElement) {
    // Is current element's background color set?
    var color = jqueryElement.css("background-color");
    
    if ((color !== 'rgba(0, 0, 0, 0)') && (color !== 'transparent')) {
        // if so then return that color
        return color;
    }

    // if not: are you at the body element?
    if (jqueryElement.is("body")) {
        // return known 'false' value
        return false;
    } else {
        // call getBackground with parent item
        return getBackground(jqueryElement.parent());
    }
}

$(function() {
    alert(getBackground($("#target")));
});