How can I add different colors to bar in Column chart

Question

How can i add different colors to Bars in Column chart. Adding colors field in option is not working. Please help.

Below is the code snippet:

tdata.a         


        

Answer 1

the colors option applies colors to each series
so if you have 3 colors
you would need 3 y-axis columns

as follows...

google.charts.load('current', {
  packages: ['corechart']
}).then(function () {
  var data = google.visualization.arrayToDataTable([
    ['x', 'y0', 'y1', 'y2'],
    ['A', 100, 120, 130]
  ]);

  var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
  chart.draw(data, {
    colors: ['red', 'green', 'blue']
  });
});

---

to color individual columns within a series,
use a 'style' column role

as follows...

note: using a 'style' column role will invalidate the legend

google.charts.load('current', {
  packages: ['corechart']
}).then(function () {
  var data = google.visualization.arrayToDataTable([
    ['x', 'y', {role: 'style', type: 'string'}],
    ['A', 100, 'red'],
    ['B', 120, 'green'],
    ['C', 130, 'blue']
  ]);

  var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
  chart.draw(data, {
    legend: 'none'
  });
});