title: changing the background color for ckEditor
body: <p>I need to change the background color dynamically on load with my ckEditor
  the page that it is on is a dynamically loading page where they user has a specific bg color.
  I can not load a css it has to be just the editor body background color</p>
  
  <p>so i tried</p>
  
  <pre><code>window.onload=function(){
      CKEDITOR.instances.editor_data.addCss( 'body { background-color: #efefef; }' );
  }
  </code></pre>
  
  <p>i do not get an error, but also do not get any changes</p>
  
  <p>i also tried</p>
  
  <pre><code>CKEDITOR.instances.editor_data.addCss( '#cke_editor_data { background-color: #efefef; }' );
  </code></pre>