title: Plotly Dash - how to set automated colors rather than having blue for everything
body: <p>I'm looking to get help in creating a bar chart in Dash (plotly) and having more than one color for all bars,at the moment they are all blue.</p>
  
  <p>e.g.</p>
  
  <pre><code>    pv = pd.pivot_table(df, index=['customer_name2'], columns=['FY'], values=['amount'], aggfunc=sum, fill_value=0)
      pv2 = pv.reindex(pv['amount'].sort_values(by='FY17', ascending=True).index).head(x_bottom)
      trace1 = go.Bar(x=pv2.index, y=pv2[('amount','FY17')], name='Revenue')
  
      graphs.append(html.Div(dcc.Graph(
      id='chart_id_6',
      figure={
          'data': [trace1],
          'layout': {
              'title': 'Bottom ' + str(x_bottom) + ' Customers'
          }
      })))
  </code></pre>