Index: wp-content/themes/twentyfourteen/style.css
===================================================================
--- wp-content/themes/twentyfourteen/style.css	(revision 26652)
+++ wp-content/themes/twentyfourteen/style.css	(working copy)
@@ -3420,6 +3420,27 @@
 		right: 12px;
 	}
 
+	.primary-navigation .current_page_item > a:after,
+	.primary-navigation .current_page_ancestor > a:after,
+	.primary-navigation .current-menu-item > a:after,
+	.primary-navigation .current-menu-ancestor > a:after {
+		border-top-color: #55d737;
+	}
+
+	.primary-navigation .current_page_item:hover > a:after,
+	.primary-navigation .current_page_ancestor:hover > a:after,
+	.primary-navigation .current-menu-item:hover > a:after,
+	.primary-navigation .current-menu-ancestor:hover > a:after {
+		border-top-color: #fff;
+	}
+
+	.primary-navigation .sub-menu .current_page_item:hover > a:after,
+	.primary-navigation .sub-menu .current_page_ancestor:hover > a:after,
+	.primary-navigation .sub-menu .current-menu-item:hover > a:after,
+	.primary-navigation .sub-menu .current-menu-ancestor:hover > a:after {
+		border-top-color: transparent;
+	}
+
 	.primary-navigation li .menu-item-has-children > a,
 	.primary-navigation li .page_item_has_children > a {
 		padding-right: 20px;
@@ -3651,6 +3672,24 @@
 		right: 26px;
 	}
 
+	.secondary-navigation .current_page_item > a:after,
+	.secondary-navigation .current_page_ancestor > a:after,
+	.secondary-navigation .current-menu-item > a:after,
+	.secondary-navigation .current-menu-ancestor > a:after {
+		border-left-color: #55d737;
+	}
+
+	.secondary-navigation .sub-menu .current_page_item > a:after,
+	.secondary-navigation .sub-menu .current_page_ancestor > a:after,
+	.secondary-navigation .sub-menu .current-menu-item > a:after,
+	.secondary-navigation .sub-menu .current-menu-ancestor > a:after,
+	.secondary-navigation .current_page_item:hover > a:after,
+	.secondary-navigation .current_page_ancestor:hover > a:after,
+	.secondary-navigation .current-menu-item:hover > a:after,
+	.secondary-navigation .current-menu-ancestor:hover > a:after {
+		border-left-color: #fff;
+	}
+
 	.footer-sidebar .widget,
 	.primary-sidebar .widget {
 		font-size: 12px;