diff --git a/docs/stylesheets/extra.css b/docs/stylesheets/extra.css
new file mode 100644
index 0000000..e69de29
diff --git a/mkdocs.yml b/mkdocs.yml
index 1e4a67c..3b341d7 100644
--- a/mkdocs.yml
+++ b/mkdocs.yml
@@ -17,11 +17,13 @@ theme:
     - media: "(prefers-color-scheme: dark)"
       scheme: slate
       toggle:
-        icon: material/brightness-4
+        icon: 🟣
         name: Switch to light mode
       primary: purple
       accent: purple
 
+extra_css:
+  - stylesheets/extra.css
 
 plugins:
   - projects: