legendMarkerColor: String

Sets the color of marker that is displayed on legend. This property works only with Pie and Doughnut charts. Value of legendMarkerColor can be “HTML Color Name” or “hex” code.

• This Property overrides default Marker’s Color in Legend.

var  chart =  new  CanvasJS.Chart("container",
{
 .
 .
  data:[ {
   dataPoints: [
    {x: 10 , y: 50 , legendText: "Apple", legendMarkerColor: "green"},

  ],

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