numix-gtk-theme/gtk-2.0/styles/inactivetext

style "inactivetext"
{

engine "mist"
 	{
	}
}

widget_class "*.<GtkLabel>" style "inactivetext"
widget_class "*.<GtkCellLayout>" style "inactivetext"
widget_class "*.<GtkMenuItem>.*" style "inactivetext"