Enabled dark theme and modified colors.

mkdocs.yml

@@ -23,8 +23,9 @@ theme:
   name: material
   palette:
     # try other colors https://squidfunk.github.io/mkdocs-material/getting-started/#primary-colors
-    primary: deep
-    accent: indigo
+    scheme: slate
+    primary: amber
+    accent: deep orange
   font:
     # See available fonts at https://fonts.google.com/
     text: Ubuntu