1. 将ApexCharts的范围面积图进行自定义：

const chart = new ApexCharts(document.querySelector("#chart"), {
  series: [{
    name: "Sample",
    data: [
      [1538866800000, 6, 9],
      [1538953200000, 5, 10],
      [1539039600000, 3, 8],
      [1539126000000, 8, 11],
      [1539212400000, 7, 10],
      [1539298800000, 9, 13],
      [1539385200000, 13, 18],
      [1539471600000, 13, 17],
      [1539558000000, 13, 16],
      [1539644400000, 14, 20]
    ]
  }],
  chart: {
    height: 350,
    type: 'rangeArea',
    toolbar: {
      show: false
    }
  },
  plotOptions: {
    rangeArea: {
      dataLabels: {
        enabled: true
      }
    }
  },
  xaxis: {
    type: 'datetime'
  },
  yaxis: {
    tooltip: {
      enabled: true
    }
  }
});

chart.render();

2. 在options中使用colors属性改变范围面积图的颜色：

const chart = new ApexCharts(document.querySelector("#chart"), {
  series: [{
    name: "Sample",
    data: [
      [1538866800000, 6, 9],
      [1538953200000, 5, 10],
      [1539039600000, 3, 8],
      [1539126000000, 8, 11],
      [1539212400000, 7, 10],
      [1539298800000, 9, 13],
      [1539385200000, 13, 18],
      [1539471600000, 13, 17],
      [1539558000000, 13, 16],
      [1539644400000, 14, 20]
    ]
  }],
  chart: {
    height: 350,
    type: 'rangeArea',
    toolbar: {
      show: false
    },
    colors: ['#0080ff']
  },
  plotOptions: {
    rangeArea: {
      dataLabels: {
        enabled: true
      }
    }
  },
  xaxis: {
    type: 'datetime'
  },
  yaxis: {
    tooltip: {
      enabled: true
    }
  }
});

chart.render();