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The border of the icon.

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

The border color of the icon.

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

The border width of the icon.

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