diff --git a/src/libsysprof-gtk/sysprof-tracks-view.c b/src/libsysprof-gtk/sysprof-tracks-view.c
index 4012b128..a1033f9c 100644
--- a/src/libsysprof-gtk/sysprof-tracks-view.c
+++ b/src/libsysprof-gtk/sysprof-tracks-view.c
@@ -121,13 +121,14 @@ G_GNUC_BEGIN_IGNORE_DEPRECATIONS
   {
     GtkStyleContext *style_context = gtk_widget_get_style_context (GTK_WIDGET (self));
     gtk_style_context_get_color (style_context, &color);
+    color.alpha *= .5;
   }
 G_GNUC_END_IGNORE_DEPRECATIONS
 
   gtk_snapshot_append_color (snapshot,
                              &color,
-                             &GRAPHENE_RECT_INIT (x, y, 1,
-                                                  gtk_widget_get_height (GTK_WIDGET (self->list_view))));
+                             &GRAPHENE_RECT_INIT (x, 0, 1,
+                                                  gtk_widget_get_height (GTK_WIDGET (self))));
 }
 
 static void