diff --git a/core/themes/seven/style.css b/core/themes/seven/style.css
index 035f1c7..7a246e8 100644
--- a/core/themes/seven/style.css
+++ b/core/themes/seven/style.css
@@ -1528,7 +1528,7 @@ fieldset.fieldset-no-legend {
   transition: background-color .1s;
 }
 [id="edit-additional-settings"] .collapsible .summary {
-  color: #858585;
+  display: none;
 }
 [id="edit-additional-settings"] .collapsible .fieldset-legend {
   margin-top: .875em;