JSFiddle - React, Tailwind, and code Playground

HTML

<div id="pisca">PALAVRA</div>

CSS

#pisca {
    color: #000;
    transition: color .7s;
}
.mostrar {
    color: #f34 !important;
}

JavaScript

function pisca() {
    var $pisca = $('#pisca');
    $pisca.addClass('mostrar');
    setTimeout(function () {
        $pisca.removeClass('mostrar');
    }, 750);
}

window.onload = function () {
    setInterval(pisca, 1500);
}