diff --git a/core/modules/block_place/block_place.libraries.yml b/core/modules/block_place/block_place.libraries.yml
new file mode 100644
index 0000000..38a32c7
--- /dev/null
+++ b/core/modules/block_place/block_place.libraries.yml
@@ -0,0 +1,5 @@
+drupal.block_place:
+  version: VERSION
+  css:
+    theme:
+      css/block-place.css: {}
diff --git a/core/modules/block_place/css/block-place.css b/core/modules/block_place/css/block-place.css
new file mode 100644
index 0000000..204364b
--- /dev/null
+++ b/core/modules/block_place/css/block-place.css
@@ -0,0 +1,15 @@
+.block-region {
+  background-color: #ff6;
+  margin: 4px;
+  margin-bottom: 4px;
+  padding: 3px 5px;
+}
+
+.block-region a {
+  white-space: pre;
+  margin: 0 0 0 1em;
+}
+
+[dir="rtl"] .block-region a {
+  margin: 0 1em 0 0;
+}
diff --git a/core/modules/block_place/src/Plugin/DisplayVariant/PlaceBlockPageVariant.php b/core/modules/block_place/src/Plugin/DisplayVariant/PlaceBlockPageVariant.php
index cd7c566..c53028b 100644
--- a/core/modules/block_place/src/Plugin/DisplayVariant/PlaceBlockPageVariant.php
+++ b/core/modules/block_place/src/Plugin/DisplayVariant/PlaceBlockPageVariant.php
@@ -119,7 +119,7 @@ public function build() {
       ];
       $build[$region] = ['block_place_operations' => $operations] + $build[$region];
     }
-
+    $build['#attached']['library'][] = 'block_place/drupal.block_place';
     return $build;
   }