How can I modify the default color in Google Charts Geomap?

I'm looking to customize the chart region color to a specific shade instead of the default yellow. Currently, I have only been able to change the marker color using the provided code to generate the chart data:

         dataTable = new google.visualization.DataTable();
         dataTable.addRows(4);
         dataTable.addColumn('number', 'LATITUDE', 'Latitude');
         dataTable.addColumn('number', 'LONGITUDE', 'Longitude');
         dataTable.addColumn('number', 'Ticket', 'Value'); 
         dataTable.addColumn('string', 'HOVER', 'HoverText');

         dataTable.setValue(0,0,12.9715987);
         dataTable.setValue(0,1,77.5945627);
         dataTable.setValue(0,2,43);
         dataTable.setValue(0,3,"Banglore");

         dataTable.setValue(1,0,22.642664);
         dataTable.setValue(1,1,88.439122);
         dataTable.setValue(1,2,66);
         dataTable.setValue(1,3,"Kolkatta");

         dataTable.setValue(2,0,13.0826802);
         dataTable.setValue(2,1,80.2707184);
         dataTable.setValue(2,2,54);
         dataTable.setValue(2,3,"Chennai");

         dataTable.setValue(3,0,9.9252007);
         dataTable.setValue(3,1,78.1197754);
         dataTable.setValue(3,2,64);
         dataTable.setValue(3,3,"Madurai");

I'm curious about how to alter the background color, region color, and tooltip color of the chart. Any assistance on this matter would be greatly appreciated.

javascriptgoogle-visualizationgeomap

Answer №1

Check out this github ticket for more information.

Here is the essential code snippet that defines the necessary options:

var options = {};
  options['region'] = 'US';
  options['resolution'] = 'provinces';
  options['colorAxis'] = { minValue : 0, maxValue : 1, colors : ['#FF0000','#0000FF']};
  options['backgroundColor'] = '#FFFFFF';
  options['datalessRegionColor'] = '#E5E5E5';
  options['width'] = 556;
  options['height'] = 347;
  options['legend'] = 'none';

  var geochart = new google.visualization.GeoChart(
      document.getElementById('visualization'));
  geochart.draw(geoData, options);

You can also refer to the details in the official documentation.

backgroundColor

This property defines the background color of the chart. It can be a simple HTML color string such as 'red' or '#00cc00', or an object with specific properties.

Type: string or object Default: white

backgroundColor.fill

The fill color of the chart represented as an HTML color string.

Type: string Default: white

backgroundColor.stroke

The color of the chart border in HTML color string format.

Type: string Default: '#666'

backgroundColor.strokeWidth

The width of the border in pixels.

Type: number Default: 0

Answer №2

Wow, this solution really did the trick for me!

colors: ['#0077CC']

If you want to incorporate this into your options, you can do it like this:

var settings = {
    region: 'IN',
    displayMode: 'markers',
    colorAxis: {colors: ['blue']}
  };

For further details, feel free to check out this link

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