Heey Samarth
Are you sure your atrribute of color is filled with data? And your attribute has a value, is it filled with a value that the widget understands?
Kind regards,
Edo
Try to configure it in the advanced tab of the series:
“marker”: { “color”: “#1F618D” }
If you enable development mode, you can also see how the configuration is set up using the ‘toggle editor’ button next to the chart. I've had similar layout issues with the preconfigured chart types like bar using dynamic values. In the advanced tabs of the series you are able to override default data values for this type of chart.