title: plot colors by color values in pandas dataframe
body: <p>I have a dataframe that looks like this.</p>
  
  <pre><code>raw_data = {'Enum': ['E330','E322','E124','E500'],'Count': [234, 122, 765, 433],
  'Colors':['red','blue','green','yellow']}
  
  additives_count = pd.DataFrame(raw_data)
  </code></pre>
  
  <p>I want to plot a bar graph and I used the code below.</p>
  
  <pre><code>ax = additives_count.plot(kind='barh',colors=additives_count['Colors'])
  </code></pre>
  
  <p>The only issue is I am not able to make the respective colors appear with the Enum. I got my bar plot, but only 1 color. So for instance, my plot should have E330 plotted as red, E322 as blue, E124 as green and E500 as yellow. How can I achieve this? </p>
  
  <p>Do note that this is just a very small subset of my data. I have a total of  30 rows to plot, but i believe you get the gist of what I am trying to achieve. Any help would be much appreciated.</p>
  
  <p>Thank you!</p>