categoryAxis.highlight.border.colorString

The color of the category highlight border. Accepts a valid CSS color string, including hex and rgb.

Example - set the category axis highlight border color

<div id="chart"></div>
<script>
$("#chart").kendoChart({
  categoryAxis: {
    categories: ["2012", "2013"],
    highlight: {
      visible: true,
      border: {
        color: "#ff0000"
      }
    }
  },
  series: [
    { data: [1, 2, 3] }
  ]
});
</script>