diff --git a/assets/js/appearance.js b/assets/js/appearance.js
index 2d7385ec..34ee826f 100644
--- a/assets/js/appearance.js
+++ b/assets/js/appearance.js
@@ -26,16 +26,19 @@ window.addEventListener("DOMContentLoaded", (event) => {
   const switcher = document.getElementById("appearance-switcher");
   const switcherMobile = document.getElementById("appearance-switcher-mobile");
 
-  updateMeta()
+  updateMeta();
+  this.updateLogo?.(getTargetAppearance());
 
   if (switcher) {
     switcher.addEventListener("click", () => {
       document.documentElement.classList.toggle("dark");
+      var targetAppearance = getTargetAppearance();
       localStorage.setItem(
         "appearance",
-        document.documentElement.classList.contains("dark") ? "dark" : "light"
+        targetAppearance
       );
-      updateMeta()
+      updateMeta();
+      this.updateLogo?.(targetAppearance);
     });
     switcher.addEventListener("contextmenu", (event) => {
       event.preventDefault();
@@ -45,11 +48,13 @@ window.addEventListener("DOMContentLoaded", (event) => {
   if (switcherMobile) {
     switcherMobile.addEventListener("click", () => {
       document.documentElement.classList.toggle("dark");
+      var targetAppearance = getTargetAppearance();
       localStorage.setItem(
         "appearance",
-        document.documentElement.classList.contains("dark") ? "dark" : "light"
+        targetAppearance
       );
-      updateMeta()
+      updateMeta();
+      this.updateLogo?.(targetAppearance);
     });
     switcherMobile.addEventListener("contextmenu", (event) => {
       event.preventDefault();
@@ -66,10 +71,31 @@ var updateMeta = () => {
   document.querySelector('meta[name="theme-color"]').setAttribute('content', style.backgroundColor);
 }
 
+{{ if and (.Site.Params.Logo) (.Site.Params.SecondaryLogo) }}
+{{ $primaryLogo := resources.Get .Site.Params.Logo }}
+{{ $secondaryLogo := resources.Get .Site.Params.SecondaryLogo }}
+{{ if and ($primaryLogo) ($secondaryLogo) }}
+var updateLogo = (targetAppearance) => {
+  var elems;
+  elems = document.querySelectorAll("img.logo")
+  targetLogoPath = 
+    targetAppearance == "{{ .Site.Params.DefaultAppearance }}" ?
+    "{{ $primaryLogo.RelPermalink }}" : "{{ $secondaryLogo.RelPermalink }}"
+  for (const elem of elems) {
+    elem.setAttribute("src", targetLogoPath)
+  }
+}
+{{ end }}
+{{- end }}
+
+var getTargetAppearance = () => {
+  return document.documentElement.classList.contains("dark") ? "dark" : "light"
+}
+
 window.addEventListener("DOMContentLoaded", (event) => {
   const scroller = document.getElementById("top-scroller");
   const footer = document.getElementById("site-footer");
   if(scroller.getBoundingClientRect().top > footer.getBoundingClientRect().top) {
     scroller.hidden = true;
   }
-});
\ No newline at end of file
+});
diff --git a/config/_default/languages.en.toml b/config/_default/languages.en.toml
index 379c57ba..31e570ba 100644
--- a/config/_default/languages.en.toml
+++ b/config/_default/languages.en.toml
@@ -7,6 +7,7 @@ rtl = false
 
 title = "Blowfish"
 # logo = "img/logo.png"
+# secondaryLogo = "img/secondary-logo.png"
 # description = "My awesome website"
 # copyright = "Copy, _right?_ :thinking_face:"
 
diff --git a/exampleSite/content/docs/configuration/index.md b/exampleSite/content/docs/configuration/index.md
index fb4d6da6..af844c6c 100644
--- a/exampleSite/content/docs/configuration/index.md
+++ b/exampleSite/content/docs/configuration/index.md
@@ -141,6 +141,7 @@ Many of the article defaults here can be overridden on a per article basis by sp
 | `enableSearch`                  | `false`      | Whether site search is enabled. Set to `true` to enable search functionality. Note that the search feature depends on the `outputs.home` setting in the [site configuration](#site-configuration) being set correctly.                            |
 | `enableCodeCopy`                | `false`      | Whether copy-to-clipboard buttons are enabled for `<code>` blocks. The `highlight.noClasses` parameter must be set to `false` for code copy to function correctly. Read more about [other configuration files](#other-configuration-files) below. |
 | `logo`                          | _Not set_    | The relative path to the site logo file within the `assets/` folder. The logo file should be provided at 2x resolution and supports any image dimensions.                                                                                         |
+| `secondaryLogo`                 | _Not set_    | The relative path to the secondary site logo file within the `assets/` folder. The logo file should be provided at 2x resolution and supports any image dimensions. This should have an inverted/contrasting colour scheme to `logo`. If set, this logo will be shown when users toggle from the `defaultAppearance` mode.      |
 | `mainSections`                  | _Not set_    | The sections that should be displayed in the recent articles list. If not provided the section with the greatest number of articles is used.                                                                                                      |
 | `showViews`                     | _Not set_    | Whether or not articles and list views are displayed. This requires firebase integrations to be enabled, look below.                                                                                                                              |
 | `showLikes`                     | _Not set_    | Whether or not articles and list likes are displayed. This requires firebase integrations to be enabled, look below.                                                                                                                              |
diff --git a/layouts/partials/head.html b/layouts/partials/head.html
index 9b37e53f..23de7dda 100644
--- a/layouts/partials/head.html
+++ b/layouts/partials/head.html
@@ -50,7 +50,7 @@
   <link type="text/css" rel="stylesheet" href="{{ $bundleCSS.RelPermalink }}"
     integrity="{{ $bundleCSS.Data.Integrity }}" />
   {{ $jsAppearance := resources.Get "js/appearance.js" }}
-  {{ $jsAppearance = $jsAppearance | resources.Minify | resources.Fingerprint "sha512" }}
+  {{ $jsAppearance = $jsAppearance | resources.ExecuteAsTemplate $jsAppearance.RelPermalink . | resources.Minify | resources.Fingerprint "sha512" }}
   <script type="text/javascript" src="{{ $jsAppearance.RelPermalink }}"
     integrity="{{ $jsAppearance.Data.Integrity }}"></script>
   {{ if .Site.Params.enableSearch | default false }}
diff --git a/layouts/partials/header/basic.html b/layouts/partials/header/basic.html
index 4a020e1a..c370accc 100644
--- a/layouts/partials/header/basic.html
+++ b/layouts/partials/header/basic.html
@@ -8,7 +8,7 @@
             <span class="sr-only">{{ .Site.Title | markdownify | emojify }}</span>
 
             <img src="{{ $logo.RelPermalink }}" width="{{ div $logo.Width 2 }}" height="{{ div $logo.Height 2 }}"
-                class="max-h-[5rem] max-w-[5rem] object-scale-down object-left nozoom" alt="{{ .Site.Title }}" />
+                class="logo max-h-[5rem] max-w-[5rem] object-scale-down object-left nozoom" alt="{{ .Site.Title }}" />
 
         </a>
     </div>