diff --git a/apps/yang-gui/yang-gui2-lib/lib/yangdetails/yangdetails.theme.scss b/apps/yang-gui/yang-gui2-lib/lib/yangdetails/yangdetails.theme.scss
new file mode 100644
index 0000000..39a342d
--- /dev/null
+++ b/apps/yang-gui/yang-gui2-lib/lib/yangdetails/yangdetails.theme.scss
@@ -0,0 +1,19 @@
+/*
+ * Copyright 2020-present Open Networking Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#yang-model-details-panel .src-frame {
+  background-color: #f4f4f4;
+}