titleBorderColor: String

Sets the color of border around the axisX title in pixels. Values of titleBorderColor can be “HTML Color Name”, “hex code”, or “rgba values”.

• titleBorderColor works when titleBorderThickness is set to some value greater than zero.

var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
 axisX:{
	title: "Axis X Title", 
	titleBorderColor: "black",
	titleBorderThickness: 2,
	.
	.
 },
 .
 . 
});
chart.render();