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The border of the icon.

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  series: [{
    data: [1, 2, 3]
  }],
  valueAxis: {
    notes: {
      icon: {
        border: {
          width: 2,
          color: "red"
        }
      },
      data: [{ value: 1 }]
    }
  }
});
</script>

The border color of the icon.

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  series: [{
    data: [1, 2, 3]
  }],
  valueAxis: {
    notes: {
      icon: {
        border: {
          width: 2,
          color: "red"
        }
      },
      data: [{ value: 1 }]
    }
  }
});
</script>

The border width of the icon.

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  series: [{
    data: [1, 2, 3]
  }],
  valueAxis: {
    notes: {
      icon: {
        border: {
          width: 2,
          color: "red"
        }
      },
      data: [{ value: 1 }]
    }
  }
});
</script>