title: How to get color of most recent plotted line in pandas df.plot()
body: <p>I would like to get the color of the my last plot</p>
  
  <pre><code>ax = df.plot() 
  df2.plot(ax=ax)
  # how to get the color of this last plot, 
  #the plot is a single timeseries, there is therefore a single color.
  </code></pre>
  
  <p>I know how to do it in <code>matplotlib.pyplot</code>, for those interested see for instance <a href="https://stackoverflow.com/questions/13395888/how-can-i-get-the-color-of-the-last-figure-in-matplotlib">here</a> but I can't find a way to do it in pandas. Is there something acting like <code>get_color()</code> in pandas?</p>