amCharts 4-未向图表添加数据时如何通过属性字段设置线条颜色

var chart = am4core.create("chartdiv", am4charts.XYChart);

var data = [{
  "category": "Category 1",
  "value": 10,
  "color": am4core.color("#FF0000") // 设置线条颜色为红色
}, {
  "category": "Category 2",
  "value": 20,
  "color": am4core.color("#00FF00") // 设置线条颜色为绿色
}, {
  "category": "Category 3",
  "value": 15,
  "color": am4core.color("#0000FF") // 设置线条颜色为蓝色
}];

var categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis());
categoryAxis.dataFields.category = "category";

var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
valueAxis.dataFields.value = "value";

var series = chart.series.push(new am4charts.LineSeries());
series.dataFields.categoryX = "category";
series.dataFields.valueY = "value";
series.stroke = am4core.color("#000000"); // 设置线条颜色为黑色
series.propertyFields.stroke = "color"; // 设置线条颜色字段为数据源中的color字段