fillOpacity: Number

Sets opacity of filled area in custom break.

Default: 0.9
Examples: .1, .5, 1. etc. 
var  chart =  new  CanvasJS.Chart("chartContainer",
{
 .
 .
axisY: {
	scaleBreaks: {
		customBreaks: [{
			fillOpacity: .2,
			.
			.
		}]
	}

},
 .
 . 
});
chart.render();
Try Editing The Code

  Also See:    

If you have any questions, please feel free to ask in our forums.Ask Question