diff --git a/website/o3dv/css/controls.css b/website/o3dv/css/controls.css
index 02f178a..c5bd450 100644
--- a/website/o3dv/css/controls.css
+++ b/website/o3dv/css/controls.css
@@ -61,6 +61,7 @@ div.ov_button:hover
 div.ov_button.outline:hover
 {
 	background: var(--ov_secondary_hover_color);
+	border: 1px solid var(--ov_primary_color);
 }
 
 }