update: test colors

app/lib/pages/widgets/cloropleth_map.dart

@@ -35,6 +35,13 @@ class _ChoroplethMapState extends State<ChoroplethMap> {
   late MapShapeSource mapShapeSource;
   late final MapZoomPanBehavior _zoomPanBehavior = MapZoomPanBehavior();
   List<IceThicknessModel> iceThicknessList = <IceThicknessModel>[];
+  List<Color> testColors = [ // NB test color
+    const Color(0xff8a003b),
+    const Color(0xff8a4300),
+    const Color(0xff8a7a00),
+    const Color(0xff538a00),
+    const Color(0xff007b8a),
+  ];
 
   @override
   void initState() {
@@ -42,11 +49,8 @@ class _ChoroplethMapState extends State<ChoroplethMap> {
 
     final Random random = Random();
     for (int i = 0; i <= 120; i++) {
-      int red = random.nextInt(256);
-      int green = random.nextInt(256);
-      int blue = random.nextInt(256);
-
-      Color randomColor = Color.fromRGBO(red, green, blue, 1);
+      int ran = random.nextInt(4); // NB test color
+      Color randomColor = testColors[ran];
 
       int randomNumber = random.nextInt(21); // 0 -> 20, NB: temp test data
       iceThicknessList.add(IceThicknessModel(i.toString(), randomNumber, randomColor));
@@ -68,8 +72,8 @@ class _ChoroplethMapState extends State<ChoroplethMap> {
                 shapeColorValueMapper: (int index) => iceThicknessList[index].color,
               ),
               //color: Colors.blue.shade400, // Map color
-              //zoomPanBehavior: _zoomPanBehavior,
-              //strokeColor: Colors.black,
+              zoomPanBehavior: _zoomPanBehavior,
+              strokeColor: Colors.black,
               // Shape selection
               selectedIndex: selectedIndex,
               onSelectionChanged: (int index) {