生成ng2图表（饼图）的随机颜色

Question

html

  <div style="display: block;">
    <canvas
      baseChart
      [data]="pieChartData"
      [labels]="pieChartLabels"
      [chartType]="pieChartType"
      [options]="pieChartOptions"
      [plugins]="pieChartPlugins"
      [legend]="pieChartLegend"
      [colors]="randomColorGenerater()"
    >
    </canvas>
  </div>

ts

 public pieChartOptions: ChartOptions = {
    responsive: true
  };
  public pieChart = false;
  public pieChartLabels: string[] = [];
  public pieChartData: SingleDataSet = [300, 500, 100];
  public pieChartType: ChartType = 'pie';
  public pieChartLegend = true;
  public pieChartPlugins = [];
  public pieChartColors = [
    {
      backgroundColor: [
        'rgba(255,0,0,0.3)',
        'rgba(0,255,0,0.3)',
        'rgba(0,0,255,0.3)'
      ]
    }
  ];

使用上述代码，我可以显示饼图，但仅使用我在Piechartcolors中给出的颜色，我需要帮助，以便根据将显示的动态数据显示随机颜色。谢谢