maskColor: String

Sets the color for masked region of Slider. Values of maskColor can be specified in “HTML Color Name”, “hex code” or “rgba values”.

Default: “#d9e8f9”
Examples: “blue”, “#a5b3dc”, … 
var stockChart = new CanvasJS.StockChart("container",
{
 .
 .
 navigator: {
   .
   .
   slider: {
     maskColor: "#a0beec"
   },
   .
   .
 },
 .
 .
});
stockChart.render();
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