title: Change Color of Stacked Grouped Google Column Chart
body: <p>Please look at <a href="http://jsfiddle.net/v1u1afzn/228/" rel="nofollow noreferrer">http://jsfiddle.net/v1u1afzn/228/</a></p>
  
  <pre><code>google.load('visualization', '1.1', {
    'packages': ['bar']
  });
  google.setOnLoadCallback(drawStuff);
  
  function drawStuff() {
    var data = new google.visualization.arrayToDataTable([
      ['Year', 'A', 'B', 'C', 'D'],
      ['2001', 321, 600, 816, 319],
      ['2002', 163, 231, 539, 594],
      ['2003', 125, 819, 123, 578],
      ['2004', 197, 536, 613, 298]
    ]);
  
    var options = {
      isStacked: true,
      vAxis: {
        viewWindow: {
          max: 1100,
          min: 0
        }
      },
      vAxes: {
        0: {
        },
        1: {
          gridlines: {
            color: 'transparent'
          },
          textStyle: {
            color: 'transparent'
          }
        },
      },
      series: {
        2: {
          targetAxisIndex: 1
        },
        3: {
          targetAxisIndex: 1
        },
      },
      colors: ['blue', 'red'],
    };
  
    var chart = new google.charts.Bar(document.getElementById('chart_div'));
    chart.draw(data, google.charts.Bar.convertOptions(options));
  };
  </code></pre>
  
  <p>How do I change the faded / lighter blue (first column top stack) to say yellow?</p>
  
  <p>I cannot find a way to change color of individual series that is grouped.</p>
  
  <p>Any ideas?</p>
  
  <p>Thanks in advance.</p>