title: Change pandas plot background color
body: <p>Is it possible to change the background in a pandas chart?</p>
  
  <p>I would like to change the background from white and the line to orange but I cannot find any documentation to do that.</p>
  
  <p>I am using the pandas as follows:</p>
  
  <pre><code>import pandas.io.data as web
  import numpy as np
  
  gs = web.get_data_yahoo('gs')['Close']
  gs = gs.pct_change()
  gs.plot()
  </code></pre>
  
  <p>Is it possible to change the background to black or any other color?</p>