JSFiddle - React, Tailwind, and code Playground

HTML

<h2><a href="#" title="ZonaW - Recursos para webmasters">ZonaW - Recursos para webmasters</a></h2>

CSS

h2 {
    font-size:25px;
    font-weight:bold;
    color: #262626;
    opacity: 1.0;
    -webkit-transition: opacity 0.5s linear;
}

h2 a {
    color: #262626;
}

h2:hover {
    opacity: 0.8;
}