ng2 charts/chart.js-如何通过编程设置特定标签上的圆环图/饼图颜色?

我有一个返回的交易列表 status 作为图表标签和 count 作为图表数据。我的标签经常 ['cancelled', 'completed', 'rejected'] ,但有时数据返回 ['cancelled', 'completed', 'error', 'pending', 'rejected] .如何为每个标签设置不同的颜色?

迄今为止我的代码:

statusCount: StatusCount[] = [];
  loaded = false;

  // Doughnut
  public chartData = [];
  public chartLabels = [];

  public chartType = 'doughnut';

  public chartOptions = {
    responsive: true,
    maintainAspectRatio: false,
    legend: {
      position: 'right'
   }
  };

  private chartColors: any[] = [{ backgroundColor: ['#E91E63', '#00BFA5', '#ff1744'] }];

  constructor(
    private apiService: ApiService
  ) { 
  }

  ngOnInit() {
    this.getTransactionStatus();
  }

  getTransactionStatus() {
    this.apiService.getTransactionStatus().subscribe((res: any) => {
      this.statusCount = res;
      for (const i of this.statusCount) {
        this.chartData.push(i.count);
        this.chartLabels.push(i.status);
      }
      this.loaded = true;
    }, error => {
      console.log(error);
    });
  }