proper color is used when highlighting aliases

frontend-js/src/main/js/map/surface/AliasSurface.js

@@ -75,6 +75,14 @@ AliasSurface.prototype.setColor = function (color) {
   }
 };
 
+/**
+ *
+ * @returns {string}
+ */
+AliasSurface.prototype.getColor = function () {
+  return this._color;
+};
+
 /**
  *
  * @param {number} opacity
@@ -188,7 +196,7 @@ AliasSurface.prototype.init = function () {
     if (overlayData !== undefined) {
       return functions.overlayToColor(overlayData);
     } else {
-      return "#FF0000";
+      return self.getColor();
     }
   }).then(function (color) {
     self.addMapCanvasObject(map.getMapCanvas().createRectangle({