how to set background color in jquery code example

Example 1: how to change the background color in jquery

$("#co").click(function(){
   $(this).css({"backgroundColor" : "blue"});
});

Example 2: jquery fedein background color

$("div" ).hover(
  function() {
     $(this).animate({backgroundColor: "#fff"}, 'slow');
  }, function() {
    $(this).animate({backgroundColor:"#000"},'slow');
  });