diff --git a/inst/manipulate_widget/manipulate_widget.css b/inst/manipulate_widget/manipulate_widget.css
index c0cb7ec..e59cded 100644
--- a/inst/manipulate_widget/manipulate_widget.css
+++ b/inst/manipulate_widget/manipulate_widget.css
@@ -227,8 +227,7 @@ html, body {
 
 /* Group of inputs */
 .panel-default>.panel-heading {
-  background-color: #4e9cff;
-  color: white;
+  background-color: #f0f0f0;
 }
 
 .panel-default>.panel-heading::before {
diff --git a/newUI/manipulate_widget.css b/newUI/manipulate_widget.css
index 4eed10d..6c70e50 100644
--- a/newUI/manipulate_widget.css
+++ b/newUI/manipulate_widget.css
@@ -219,8 +219,7 @@ html, body {
 
 /* Group of inputs */
 .panel-default>.panel-heading {
-  background-color: #4e9cff;
-  color: white;
+  background-color: #f0f0f0;
 }
 
 .panel-default>.panel-heading.collapsed::before {