diff --git a/newtab.html b/newtab.html
index 04bea63..6018c1d 100644
--- a/newtab.html
+++ b/newtab.html
@@ -370,6 +370,23 @@
           <span class="theme-card-label">Stealth</span>
           <span class="theme-card-check">✓</span>
         </div>
+        <div class="theme-card theme-card-custom" data-value="custom" role="button" tabindex="0" aria-pressed="false" data-i18n-aria-label="theme.card.custom">
+          <span class="theme-card-custom-swatch"></span>
+          <span class="theme-card-label" data-i18n="theme.builder.title">Eigenes</span>
+          <span class="theme-card-check">✓</span>
+        </div>
+      </div>
+      <div class="theme-builder-panel hidden" id="themeBuilderPanel">
+        <div class="tb-grid">
+          <div class="tb-picker"><input type="color" id="tbAccent" value="#6c8cff"><label for="tbAccent" data-i18n="theme.builder.accent">Akzent</label></div>
+          <div class="tb-picker"><input type="color" id="tbBg" value="#0b0d12"><label for="tbBg" data-i18n="theme.builder.bg">Hintergrund</label></div>
+          <div class="tb-picker"><input type="color" id="tbBoard" value="#141821"><label for="tbBoard" data-i18n="theme.builder.board">Board-Fläche</label></div>
+          <div class="tb-picker"><input type="color" id="tbText" value="#e6e8ef"><label for="tbText" data-i18n="theme.builder.text">Text primär</label></div>
+          <div class="tb-picker"><input type="color" id="tbTextSec" value="#9aa3b8"><label for="tbTextSec" data-i18n="theme.builder.text_secondary">Text sekundär</label></div>
+          <div class="tb-picker"><input type="color" id="tbTextMuted" value="#5b6478"><label for="tbTextMuted" data-i18n="theme.builder.text_muted">Text gedämpft</label></div>
+        </div>
+        <div class="tb-contrast good" id="tbContrast"><span class="tb-dot"></span><span id="tbContrastText" data-i18n="theme.builder.contrast_good">Gut lesbar</span></div>
+        <div class="tb-foot"><button class="tb-reset" id="tbReset" data-i18n="theme.builder.reset">Zurücksetzen</button></div>
       </div>
       <div class="theme-modal-section">
         <h3 class="settings-section-title" data-i18n="settings.section.bg">HINTERGRUND</h3>