chore: Change default blue colour

source/_pages/talks.html.twig

@@ -11,7 +11,7 @@ use:
         {% for talk in data.talks|sort((a,b) => a.sortable_date < b.sortable_date) %}
             <article>
                 <h2>
-                    <a class="text-blue-800 dark:text-blue-400" href="{{ talk.url }}">
+                    <a class="text-blue-primary dark:text-blue-400" href="{{ talk.url }}">
                         {{ talk.title }}
                     </a>
                 </h2>