The border color of the icon.
<div id="sparkline"></div>
<script>
$("#sparkline").kendoSparkline({
type: "line",
series: [{
data: [10, 15, 8, 12],
notes: {
data: [{
value: 15,
text: "Peak Value"
}],
icon: {
border: {
color: "green",
width: 2
}
}
}
}]
});
</script>