diff --git a/website/templates/pages/demo/content.handlebars b/website/templates/pages/demo/content.handlebars
index 813b9b1..1583195 100644
--- a/website/templates/pages/demo/content.handlebars
+++ b/website/templates/pages/demo/content.handlebars
@@ -33,7 +33,7 @@
     </div>
 
     <div class="columns is-desktop is-multiline">
-      <div class="column is-one-fifth-widescreen">
+      <div class="column is-one-sixth-widescreen">
         <label title="Output format of the HTML, either line by line or side by side">
           <p>Output Format</p>
           <select class="options-label-value" id="diff-url-options-output-format" name="outputFormat">
@@ -42,14 +42,24 @@
           </select>
         </label>
       </div>
-      <div class="column is-one-fifth-widescreen">
+      <div class="column is-one-sixth-widescreen">
+        <label title="Color scheme to render. Auto uses user preference.">
+          <p>Color Scheme</p>
+          <select class="options-label-value" id="diff-url-options-color-scheme" name="colorScheme">
+            <option value="light" selected>Light</option>
+            <option value="dark">Dark</option>
+            <option value="auto">Auto</option>
+          </select>
+        </label>
+      </div>
+      <div class="column is-one-sixth-widescreen">
         <label title="Show the file list summary before the diff">
           <p>File Summary</p>
           <input class="options-label-value" id="diff-url-options-show-files" type="checkbox" name="drawFileList"
             checked />
         </label>
       </div>
-      <div class="column is-one-fifth-widescreen">
+      <div class="column is-one-sixth-widescreen">
         <label title="Level of matching for the comparison algorithm">
           <p>Matching Type</p>
           <select class="options-label-value" id="diff-url-options-matching" name="matching">
@@ -59,14 +69,14 @@
           </select>
         </label>
       </div>
-      <div class="column is-one-fifth-widescreen">
+      <div class="column is-one-sixth-widescreen">
         <label title="Similarity threshold for the matching algorithm">
           <p>Words Threshold</p>
           <input class="options-label-value" id="diff-url-options-match-words-threshold" type="number"
             name="matchWordsThreshold" value="0.25" step="0.05" min="0" max="1" />
         </label>
       </div>
-      <div class="column is-one-fifth-widescreen">
+      <div class="column is-one-sixth-widescreen">
         <label title="Maximum number of comparison performed by the matching algorithm in a block of changes">
           <p>Max Comparisons</p>
           <input class="options-label-value" id="diff-url-options-matching-max-comparisons" type="number"
@@ -134,4 +144,4 @@
       providing better diff support for existing online services.
     </p>
   </div>
-</section>
\ No newline at end of file
+</section>
diff --git a/website/templates/pages/demo/demo.ts b/website/templates/pages/demo/demo.ts
index 53c7019..7621573 100644
--- a/website/templates/pages/demo/demo.ts
+++ b/website/templates/pages/demo/demo.ts
@@ -200,6 +200,7 @@ type Elements = {
   };
   options: {
     outputFormat: HTMLInputElement;
+    colorScheme: HTMLInputElement;
     matching: HTMLInputElement;
     wordsThreshold: HTMLInputElement;
     matchingMaxComparisons: HTMLInputElement;
@@ -259,6 +260,7 @@ document.addEventListener('DOMContentLoaded', async () => {
     },
     options: {
       outputFormat: getHTMLInputElementById('diff-url-options-output-format'),
+      colorScheme: getHTMLInputElementById('diff-url-options-color-scheme'),
       matching: getHTMLInputElementById('diff-url-options-matching'),
       wordsThreshold: getHTMLInputElementById('diff-url-options-match-words-threshold'),
       matchingMaxComparisons: getHTMLInputElementById('diff-url-options-matching-max-comparisons'),
@@ -272,6 +274,7 @@ document.addEventListener('DOMContentLoaded', async () => {
 
   // Update HTML inputs from any changes in URL
   config.outputFormat && (elements.options.outputFormat.value = config.outputFormat);
+  config.colorScheme && (elements.options.colorScheme.value = config.colorScheme);
   config.drawFileList && (elements.checkboxes.drawFileList.checked = config.drawFileList);
   config.matching && (elements.options.matching.value = config.matching);
   config.matchWordsThreshold && (elements.options.wordsThreshold.value = config.matchWordsThreshold.toString());