Javascript 我的图表的边框颜色

我用。
问题在于边界的不同颜色。当您仔细观察时，您将看到左边框和下边框为黑色，而上边框和右边框为灰色：

有没有办法控制边框颜色？我希望它们都是灰色的

代码如下：

var chart = AmCharts.makeChart("chartdiv", {
  "type": "xy",
  "autoMarginOffset": 20,
  "dataProvider": data,
  "valueAxes": [{
    "position": "bottom",
    "axisAlpha": 0,
  }, {
    "position": "left",
    "axisAlpha": 0,
  }, {
    "id": "v3",
    "position": "right",
    "axisAlpha": 0
  }],
  "graphs": [{
    "bullet": "round",
    "xField": "ax",
    "yField": "ay",
    "fillAlphas": 0
  }, {
    "bullet": "round",
    "xField": "bx",
    "yField": "by",
    "yAxis": "v3",
  }]
});

---

.

这些线已经是灰色的（技术上是黑色的，默认情况下gridAlpha为0.15），但是多个轴在零处的网格线重叠会导致左侧和底部的轴线看起来更暗

您必须在所有轴上设置为0，以使左侧和底部的线条看起来更像图表的另一侧：

  "valueAxes": [{
    "position": "bottom",
    "axisAlpha": 0,
    "zeroGridAlpha": 0
  }, {
    "position": "left",
    "axisAlpha": 0,
    "zeroGridAlpha": 0
  }, {
    "id": "v3",
    "position": "right",
    "axisAlpha": 0,
    "zeroGridAlpha": 0
  }],