ortant values they need w/o having to get it from the DOM at runtime. For instance, this can be leveraged to keep the theme of the UI and contents in sync (colors and typeface).</p>

      <p>For instance, in NodeJS, you would add ReadiumCSS to your dependencies then import it like this:</p>

      <pre><code>import defaultColors from "readium-css/css/vars/colors.json";

const backgroundColor = defaultColors.RS__backgroundColor;</code></pre>
    </section>

    <section id="theming-improvements" class="leve