title: How to change color of the stacked bar charts in amchart
body: <p>I have started exploring AmCharts recently and was impressed by its superb features. However, I am trying to change the color of each stack in the bar but I haven`t been successful so far. I tried various properties like "balloonColor" to change the color of the respective stack but nothing happened.</p>
  
  <p>Can someone let me know how can we do this? </p>
  
  <p>This is the <a href="https://www.amcharts.com/demos/stacked-bar-chart/" rel="noreferrer">graph</a> I am taking about.</p>