diff --git a/assets/js/theme.js b/assets/js/theme.js
deleted file mode 100644
index 5d7ad30a..00000000
--- a/assets/js/theme.js
+++ /dev/null
@@ -1,13 +0,0 @@
-/**
- * Theme setting
- */
-
-function setThemeCookie() {
-  if (window.matchMedia('(prefers-color-scheme: dark)').matches) {
-    document.cookie = `theme=dark; path=/; max-age=788923800; samesite=lax`;
-  } else {
-    document.cookie = `theme=light; path=/; max-age=788923800; samesite=lax`;
-  }
-}
-
-export { setThemeCookie };
diff --git a/assets/js/when-ready.js b/assets/js/when-ready.js
index 6bec6a1f..4f52a875 100644
--- a/assets/js/when-ready.js
+++ b/assets/js/when-ready.js
@@ -32,7 +32,6 @@ import { setupTimestamps }      from './timeago';
 import { setupImageUpload }     from './upload';
 import { setupSearch }          from './search';
 import { setupToolbar }         from './textiletoolbar';
-import { setThemeCookie }       from './theme';
 import { hideStaffTools }       from './staffhider';
 import { pollOptionCreator }    from './poll';
 
@@ -64,8 +63,7 @@ whenReady(() => {
   setupTimestamps();
   setupImageUpload();
   setupSearch();
-  setupToolbar()
-  setThemeCookie();
+  setupToolbar();
   hideStaffTools();
   pollOptionCreator();
 
diff --git a/lib/philomena_web/views/layout_view.ex b/lib/philomena_web/views/layout_view.ex
index 810028d6..aec16af8 100644
--- a/lib/philomena_web/views/layout_view.ex
+++ b/lib/philomena_web/views/layout_view.ex
@@ -64,24 +64,14 @@ defmodule PhilomenaWeb.LayoutView do
     Config.get(:footer)
   end
 
-  def stylesheet_path(conn, %{theme: "default"}),
-    do: Routes.static_path(conn, "/css/default.css")
-
   def stylesheet_path(conn, %{theme: "dark"}),
     do: Routes.static_path(conn, "/css/dark.css")
 
   def stylesheet_path(conn, %{theme: "red"}),
     do: Routes.static_path(conn, "/css/red.css")
 
-  def stylesheet_path(conn, _user) do
-    case conn.cookies do
-      %{"theme" => "dark"} ->
-        Routes.static_path(conn, "/css/dark.css")
-
-      _ ->
-        Routes.static_path(conn, "/css/default.css")
-    end
-  end
+  def stylesheet_path(conn, _user),
+    do: Routes.static_path(conn, "/css/default.css")
 
   def theme_name(%{theme: theme}), do: theme
   def theme_name(_user), do: "default"