Highcharts - change pie slice color on existing chart -

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I have a pie chart that already exists. I need to change the color of the specific piece I have tried ... 

  chart.series [0] .data [4] .graphic.attr ({fill: '# ff0000'} );

But it only temporarily changes color until it becomes the object. I have also tried to make a general change of alternative method.

How do I change it for the good?

Just use the method, such as: 

  chart.series [0] .data [4] .update ({color: '# FF0000'});

.


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