series.labels.font String|Function
(default: "12px Arial,Helvetica,sans-serif")
The font style of the labels. Accepts a valid CSS font string, for example "20px Courier New'".
Example - set the chart series label font
<div id="chart"></div>
<script>
$("#chart").kendoChart({
series: [ {
labels: {
visible: true,
font: "20px sans-serif"
},
data: [1, 2, 3]
}]
});
</script>