diff --git a/webroot/rsrc/css/core/remarkup.css b/webroot/rsrc/css/core/remarkup.css
index faaeb9af48..723d7e8c92 100644
--- a/webroot/rsrc/css/core/remarkup.css
+++ b/webroot/rsrc/css/core/remarkup.css
@@ -340,3 +340,7 @@ div.phabricator-remarkup-dark .remarkup-note,
 div.phabricator-remarkup-dark table {
   color: #000;
 }
+
+div.phabricator-remarkup-dark hr {
+  border-color: #555;
+}