possibility to modify color of overlay

frontend-js/src/main/js/minerva.js

@@ -181,7 +181,8 @@ function createMarkerElements(params, type, isDefault) {
     } else if (elementParam.options.type === type) {
       markerElements.push({
         element : elementParam.element,
-        icon : elementParam.options.icon
+        icon : elementParam.options.icon,
+        color : elementParam.options.color,
       });
     } else if (elementParam.options.type !== "ICON" && elementParam.options.type !== "SURFACE") {
       throw new Error("Unknown type:" + elementParam.options.type);