diff --git a/12/style.css b/12/style.css
index e1cc98e..716956e 100644
--- a/12/style.css
+++ b/12/style.css
@@ -635,10 +635,18 @@ cursor:pointer;
 filter: invert(1);
 }
 
-#shell_03_header{
+#shell_03header{
   padding: 10px;
   cursor: move;
   z-index: 10;
-  background-color: #2196F3;
+  background-color: grey;
+  color: #fff;
+}
+
+#audio_05header{
+  padding: 10px;
+  cursor: move;
+  z-index: 10;
+  background-color: grey;
   color: #fff;
 }
\ No newline at end of file