remove passed variable

use property instead

src/controllers/analytic_controller.ts

@@ -68,9 +68,10 @@ export class AnalyticController {
   }
 
   createNew() {
-    this._newAnalyticUnit = new AnalyticUnit(undefined, ANALYTIC_UNIT_COLORS[this._currentColorIndex]);
+    this._newAnalyticUnit = new AnalyticUnit();
     this._creatingNewAnalyticType = true;
     this._savingNewAnalyticUnit = false;
+    this._newAnalyticUnit.color = ANALYTIC_UNIT_COLORS[this._currentColorIndex];
     this._currentColorIndex++;
     this._currentColorIndex %= ANALYTIC_UNIT_COLORS.length;
   }

src/models/analytic_unit.ts

@@ -4,6 +4,7 @@ import { Segment, SegmentId } from './segment';
 import { Metric } from './metric';
 
 import _ from 'lodash';
+import { ANALYTIC_UNIT_COLORS } from '../colors';
 
 
 export type AnalyticSegmentPair = { anomalyType: AnalyticUnit, segment: AnalyticSegment };
@@ -32,12 +33,12 @@ export class AnalyticUnit {
 
   private _alertEnabled?: boolean;
 
-  constructor(private _panelObject?: any, color?: string) {
+  constructor(private _panelObject?: any) {
     if(_panelObject === undefined) {
       this._panelObject = {};
     }
     _.defaults(this._panelObject, {
-      name: 'AnalyticUnitName', confidence: 0.2, color, type: 'general'
+      name: 'AnalyticUnitName', confidence: 0.2, color: ANALYTIC_UNIT_COLORS[0], type: 'general'
     });
 
     //this._metric = new Metric(_panelObject.metric);