Fixes

- Fixed "Blackboard" theme
- Removed "fetch[]" functions, eliminating console warnings
- Fixed error where pressing "Apply" without having a theme selected would crash the site

data/themes.json

@@ -25,7 +25,7 @@
             "label": "Blackboard",
             "value": 3,
             "mainColor": "#fffdea",
-            "accentColor": "5c5c5c",
+            "accentColor": "#5c5c5c",
             "backgroundColor": "#1a1a1a"
         },
         {