color : String

Sets the color of crosshair.

Default: “grey”
Example: “green”, “#23EA23” 
var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
axisX :{
    crosshair: {
        enabled: true,
	color: "red",
	.
        .
    }

},
 .
 . 
});
chart.render();
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