The border color of the icon.
<div id="chart"></div>
<script>
$("#chart").kendoChart({
dataSource: {
data: [{
value: 1,
noteText: "A"
}]
},
series: [{
field: "value",
noteTextField: "noteText",
notes: {
icon: {
border: {
width: 2,
color: "red"
}
}
}
}]
});
</script>