labelBackgroundColor: String

Sets the background color of stripLine’s label.

Default: “transparent”
Example: “red”,”#fabd76″ 
var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
axisY:{
    stripLines: [{
        .
        labelBackgroundColor:"black",
        .
    }]
},
 .
 .
});
chart.render();
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