message: Implemented - Passing backgroundColor as an option for SignaturePad
diff: @@ -92,6 +92,7 @@ export class QuestionSignaturePadModel extends Question {
  };
  signaturePad.penColor = this.penColor;
  + signaturePad.backgroundColor = this.backgroundColor;
  signaturePad.onBegin = () => {
  canvas.focus();
  };
  @@ -177,6 +178,15 @@ export class QuestionSignaturePadModel extends Question {
  public set penColor(val: string) {
  this.setPropertyValue("penColor", val);
  }
  + /**
  + * Use it to set background color for the signature pad.
  + */
  + public get backgroundColor(): string {
  + return this.getPropertyValue("backgroundColor", "#ffffff");
  + }
  + public set backgroundColor(val: string) {
  + this.setPropertyValue("backgroundColor", val);
  + }
  /**
  * The clear signature button caption.
  */
  @@ -208,6 +218,11 @@ Serializer.addClass(
  category: "general",
  default: "#1ab394",
  },
  + {
  + name: "backgroundColor:color",
  + category: "general",
  + default: "#ffffff",
  + },
  {
  name: "dataFormat",
  category: "general",
  