tuning: Colorize dev and test env admin

tuning/wagtail_hooks.py

+from django.conf import settings
 from django.contrib.postgres.lookups import Unaccent
 from django.db.models.functions import Lower
 from django.utils.safestring import mark_safe
@@ -27,3 +28,16 @@ def add_another_welcome_panel(request, panels):
 @hooks.register("construct_explorer_page_queryset")
 def show_my_profile_only(parent_page, pages, request):
     return pages.order_by(Unaccent(Lower("title")))
+
+
+@hooks.register("insert_global_admin_css")
+def global_admin_css():
+    if settings.MAJAK_ENV == "test":
+        return mark_safe(
+            '<style type="text/css">.sidebar__inner { background-color: #00203A }</style>'
+        )
+    if settings.MAJAK_ENV == "dev":
+        return mark_safe(
+            '<style type="text/css">.sidebar__inner { background-color: #002A20 }</style>'
+        )
+    return ""