diff --git a/modules/opd_daily_emails/src/Form/KitSubscriptionForm.php b/modules/opd_daily_emails/src/Form/KitSubscriptionForm.php
index 248e9411b..10deb87b8 100644
--- a/modules/opd_daily_emails/src/Form/KitSubscriptionForm.php
+++ b/modules/opd_daily_emails/src/Form/KitSubscriptionForm.php
@@ -6,6 +6,7 @@ namespace Drupal\opd_daily_emails\Form;
 
 use Drupal\Core\Form\FormBase;
 use Drupal\Core\Form\FormStateInterface;
+use Drupal\Core\Site\Settings;
 
 final class KitSubscriptionForm extends FormBase {
 
@@ -26,7 +27,7 @@ final class KitSubscriptionForm extends FormBase {
       '#type' => 'html_tag',
       '#tag' => 'div',
       '#attributes' => [
-        'class' => 'prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-neutral-400 prose-code:before:content-[\'\'] prose-code:after:content-[\'\'] prose-pre:bg-neutral-100 prose-pre:text-black prose-pre:rounded-none prose-code:bg-neutral-100',
+        'class' => Settings::get('prose_classes'),
         'style' => 'margin-bottom: 1rem;',
       ],
     ];
diff --git a/settings.php b/settings.php
index 9dfdb2649..3763435a7 100644
--- a/settings.php
+++ b/settings.php
@@ -881,3 +881,6 @@ $databases['default']['default'] = array (
 );
 
 $settings['tome_sync_encoder'] = 'yaml';
+
+$settings['prose_classes'] = 'prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-neutral-400 prose-code:before:content-[\'\'] prose-code:after:content-[\'\'] prose-pre:bg-neutral-100 prose-pre:text-black prose-pre:rounded-none prose-code:bg-neutral-100';
+
diff --git a/themes/opdavies/components/testimonial.html.twig b/themes/opdavies/components/testimonial.html.twig
index 6f7d9f576..e229b1143 100644
--- a/themes/opdavies/components/testimonial.html.twig
+++ b/themes/opdavies/components/testimonial.html.twig
@@ -1,5 +1,5 @@
 <article>
-  <div class="prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-grey-400 prose-code:before:content-[''] prose-code:after:content-['']">
+  <div class="{{ prose_classes }}">
     <blockquote>
       {{ text }}
     </blockquote>
diff --git a/themes/opdavies/opdavies.theme b/themes/opdavies/opdavies.theme
new file mode 100644
index 000000000..d4766c7b6
--- /dev/null
+++ b/themes/opdavies/opdavies.theme
@@ -0,0 +1,9 @@
+<?php
+
+declare(strict_types=1);
+
+use Drupal\Core\Site\Settings;
+
+function opdavies_preprocess(array &$variables): void {
+  $variables['prose_classes'] = Settings::get('prose_classes');
+}
diff --git a/themes/opdavies/templates/email-signup-form.html.twig b/themes/opdavies/templates/email-signup-form.html.twig
index 530fa2483..cb0cea8f6 100644
--- a/themes/opdavies/templates/email-signup-form.html.twig
+++ b/themes/opdavies/templates/email-signup-form.html.twig
@@ -77,8 +77,7 @@
         </div>
 
         <footer class="px-4 mt-4 text-center">
-          <div class="prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-neutral-400 prose-code:before:content-[''] prose-code:after:content-['']
-    ">
+          <div class="{{ prose_classes }}">
             <p>Not sure? <a href="/archive">Browse the archive →</a></p>
           </div>
         </footer>
diff --git a/themes/opdavies/templates/field--body.html.twig b/themes/opdavies/templates/field--body.html.twig
index ecf354383..40bd835bc 100644
--- a/themes/opdavies/templates/field--body.html.twig
+++ b/themes/opdavies/templates/field--body.html.twig
@@ -44,10 +44,6 @@
   ]
 %}
 
-{%
-  set prose_classes = "prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-neutral-400 prose-code:before:content-[''] prose-code:after:content-[''] prose-pre:bg-neutral-100 prose-pre:text-black prose-pre:rounded-none prose-code:bg-neutral-100"
-%}
-
 {% if label_hidden %}
   {% if multiple %}
     <div{{ attributes }}>
diff --git a/themes/opdavies/templates/node--podcast-episode--full.html.twig b/themes/opdavies/templates/node--podcast-episode--full.html.twig
index ee5cf0129..44ad35b26 100644
--- a/themes/opdavies/templates/node--podcast-episode--full.html.twig
+++ b/themes/opdavies/templates/node--podcast-episode--full.html.twig
@@ -69,7 +69,7 @@
   {% endif %}
   {{ title_suffix }}
 
-  <div class="prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-neutral-400 prose-code:before:content-[''] prose-code:after:content-['']">
+  <div>
     {% if display_submitted %}
       <div class="my-2 text-base">
         {% set created = node.getCreatedTime() %}
diff --git a/themes/opdavies/templates/node--podcast-episode.html.twig b/themes/opdavies/templates/node--podcast-episode.html.twig
index 3bbb9a83b..a9341c677 100644
--- a/themes/opdavies/templates/node--podcast-episode.html.twig
+++ b/themes/opdavies/templates/node--podcast-episode.html.twig
@@ -69,7 +69,7 @@
   {% endif %}
   {{ title_suffix }}
 
-  <div class="prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-neutral-400 prose-code:before:content-[''] prose-code:after:content-['']">
+  <div class="{{ prose_classes }}">
     {% if display_submitted %}
       <div class="my-2 text-base">
         {% set created = node.getCreatedTime() %}
diff --git a/themes/opdavies/templates/node--testimonial.html.twig b/themes/opdavies/templates/node--testimonial.html.twig
index 063023cd1..ffcdeebd5 100644
--- a/themes/opdavies/templates/node--testimonial.html.twig
+++ b/themes/opdavies/templates/node--testimonial.html.twig
@@ -67,6 +67,7 @@
     uri: node.field_image|file_uri,
   },
   name: label,
+  prose_classes: prose_classes,
   role: content.field_role.0|render,
   text: content.body.0|render,
   url: content.field_url.0['#url']|render,
diff --git a/themes/opdavies/templates/page.html.twig b/themes/opdavies/templates/page.html.twig
index f65c2917c..7796ac39d 100644
--- a/themes/opdavies/templates/page.html.twig
+++ b/themes/opdavies/templates/page.html.twig
@@ -106,7 +106,7 @@
               <img src="/assets/images/social-avatar.jpg" alt="Picture of Oliver" class="my-0 w-16 h-16 rounded-full ring-[3px] ring-blue-primary dark:ring-white">
             </div>
 
-            <div class="prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-neutral-400 prose-code:before:content-[''] prose-code:after:content-['']">
+            <div class="{{ prose_classes }}">
               <p>I'm a certified Drupal Triple Expert and former Drupal Association staff member with 18 years of experience, a Drupal core contributor, <a href="/presentations">public speaker</a>, <a href="https://www.youtube.com/@opdavies/streams">live streamer</a>, and host of the <a href="/podcast">Beyond Blocks podcast</a>.</p>
             </div>
           </div>
diff --git a/themes/opdavies/templates/views-view--daily-email-archive.html.twig b/themes/opdavies/templates/views-view--daily-email-archive.html.twig
index 51123fcdf..206070396 100644
--- a/themes/opdavies/templates/views-view--daily-email-archive.html.twig
+++ b/themes/opdavies/templates/views-view--daily-email-archive.html.twig
@@ -42,7 +42,7 @@
   {{ title }}
   {{ title_suffix }}
 
-  <div class="prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-neutral-400 prose-code:before:content-[''] prose-code:after:content-['']">
+  <div class="{{ prose_classes }}">
     {% if header %}
       <header>
         {{ header }}
diff --git a/themes/opdavies/templates/views-view--podcast-episodes.html.twig b/themes/opdavies/templates/views-view--podcast-episodes.html.twig
index d38a041da..3f2b6a249 100644
--- a/themes/opdavies/templates/views-view--podcast-episodes.html.twig
+++ b/themes/opdavies/templates/views-view--podcast-episodes.html.twig
@@ -44,7 +44,7 @@
 
   <div>
     {% if header %}
-      <header class="prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-neutral-400 prose-code:before:content-[''] prose-code:after:content-['']">
+      <header class="{{ prose_classes }}">
         {{ header }}
       </header>
     {% endif %}
diff --git a/themes/opdavies/templates/views-view--recent-daily-emails.html.twig b/themes/opdavies/templates/views-view--recent-daily-emails.html.twig
index ba17610ea..dac8e412d 100644
--- a/themes/opdavies/templates/views-view--recent-daily-emails.html.twig
+++ b/themes/opdavies/templates/views-view--recent-daily-emails.html.twig
@@ -42,7 +42,7 @@
   {{ title }}
   {{ title_suffix }}
 
-  <div class="prose prose-p:text-black prose-a:font-light prose-a:text-blue-primary prose-p:text-lg prose-blockquote:border-blue-primary dark:marker:text-white prose-li:my-1 prose-li:text-lg prose-figcaption:text-white prose-li:text-black marker:text-black dark:prose-p:text-white dark:prose-invert dark:prose-a:text-blue-400 dark:prose-blockquote:border-blue-400 dark:prose-li:text-white prose-a:hover:no-underline prose-h2:text-xl prose-code:font-normal prose-h2:mb-4 prose-ul:my-3 dark:prose-hr:border-neutral-400 prose-code:before:content-[''] prose-code:after:content-[''] prose-pre:bg-neutral-100 prose-pre:text-black prose-pre:rounded-none prose-code:bg-neutral-100">
+  <div class="{{ prose_classes }}">
     {% if header %}
       <header>
         {{ header }}