diff --git a/apps/theming/css/theming.scss b/apps/theming/css/theming.scss
index 77fc6f7020..252d009289 100644
--- a/apps/theming/css/theming.scss
+++ b/apps/theming/css/theming.scss
@@ -116,3 +116,23 @@ input.primary {
 		}
 	}
 }
+
+@if ($color-primary == #ffffff) {
+	/* show grey border below header */
+	#body-user #header,
+	#body-settings #header,
+	#body-public #header {
+		border-bottom: 1px solid #ebebeb;
+	}
+
+	/* show triangle in header in grey */
+	#appmenu li a.active:before,
+	.header-right #settings #expand:before {
+		border-bottom-color:#ebebeb;
+	}
+
+	/* show border around quota bar in files app */
+	.app-files #quota .quota-container {
+		border: 1px solid #ebebeb;
+	}
+}
diff --git a/core/css/header.scss b/core/css/header.scss
index e744d3acb4..f62759a89d 100644
--- a/core/css/header.scss
+++ b/core/css/header.scss
@@ -528,6 +528,11 @@ nav {
 		left: 50%;
 		bottom: 0;
 		z-index: 100;
+		display: none;
+	}
+	li a.active:before,
+	li:hover a:before,
+	li:hover a.active:before {
 		display: block;
 	}
 	&.menu-open li:hover a:before,