diff --git a/webviz_subsurface/plugins/_map_viewer_fmu/callbacks.py b/webviz_subsurface/plugins/_map_viewer_fmu/callbacks.py
index b3e887788..bf97d5ef0 100644
--- a/webviz_subsurface/plugins/_map_viewer_fmu/callbacks.py
+++ b/webviz_subsurface/plugins/_map_viewer_fmu/callbacks.py
@@ -53,7 +53,7 @@ def plugin_callbacks(
     ensemble_fault_polygons_providers: Dict[str, EnsembleFaultPolygonsProvider],
     fault_polygons_server: FaultPolygonsServer,
     field_outline_polygons: xtgeo.Polygons,
-    field_outline_color: List[int],
+    field_outline_color:str,
     map_surface_names_to_fault_polygons: Dict[str, str],
     well_picks_provider: Optional[WellPickProvider],
     fault_polygon_attribute: Optional[str],
@@ -530,6 +530,7 @@ def _update_map(
                 LayoutLabels.SHOW_FIELD_OUTLINE in options
                 and field_outline_polygons is not None
             ):
+                
                 layer_model.update_layer_by_id(
                     layer_id=f"{LayoutElements.FIELD_OUTLINE_LAYER}-{idx}",
                     layer_data={
diff --git a/webviz_subsurface/plugins/_map_viewer_fmu/map_viewer_fmu.py b/webviz_subsurface/plugins/_map_viewer_fmu/map_viewer_fmu.py
index 6960ec232..9cc2e5068 100644
--- a/webviz_subsurface/plugins/_map_viewer_fmu/map_viewer_fmu.py
+++ b/webviz_subsurface/plugins/_map_viewer_fmu/map_viewer_fmu.py
@@ -19,8 +19,8 @@
 from webviz_subsurface._providers.ensemble_surface_provider.surface_image_server import (
     SurfaceImageServer,
 )
-from webviz_subsurface._utils.webvizstore_functions import read_csv
-
+from webviz_subsurface._utils.webvizstore_functions import read_csv, get_path
+from webviz_subsurface._utils.colors import hex_to_rgb
 from ._tmp_well_pick_provider import WellPickProvider
 from .callbacks import plugin_callbacks
 from .color_tables import default_color_tables
@@ -41,7 +41,7 @@ class MapViewerFMU(WebvizPluginABC):
 * **`well_pick_file`:** A csv file with well picks.  See data input.
 * **`fault_polygon_attribute`:** Which set of fault polygons to use.
 * **`field_outline_polygons_file_path`:** Full filepath to a field outline polygons file.
-* **`field_outline_color:** Color of the field outline polygons (rgb).
+* **`field_outline_color:** Color of the field outline polygons (hex).
 * **`map_surface_names_to_well_pick_names`:** Allows mapping of file surface names
     to the relevant well pick name
 * **`map_surface_names_to_fault_polygons`:** Allows mapping of file surface names
@@ -97,7 +97,7 @@ def __init__(
         well_pick_file: Path = None,
         fault_polygon_attribute: Optional[str] = None,
         field_outline_polygons_file_path: Path = None,
-        field_outline_color: List[int] = [200, 200, 200],
+        field_outline_color_hex:str = "#8b008b",
         map_surface_names_to_fault_polygons: Dict[str, str] = None,
         map_surface_names_to_well_pick_names: Dict[str, str] = None,
         rel_surface_folder: str = "share/results/maps",
@@ -163,14 +163,16 @@ def __init__(
         for fault_polygons_provider in self._ensemble_fault_polygons_providers.values():
             self._fault_polygons_server.add_provider(fault_polygons_provider)
         self.field_outline_polygons = None
-        if field_outline_polygons_file_path is not None:
+        self.field_outline_polygons_file_path = field_outline_polygons_file_path
+        if self.field_outline_polygons_file_path is not None:
             try:
-                self.field_outline_polygons = xtgeo.Polygons(
-                    read_csv(field_outline_polygons_file_path)
+                self.field_outline_polygons = xtgeo.polygons_from_file(
+                    get_path(self.field_outline_polygons_file_path)
                 )
             except:
                 print("Error reading field outline polygons file")
-        self.field_outline_color = field_outline_color
+        self.field_outline_color = hex_to_rgb(field_outline_color_hex)
+        
         self.map_surface_names_to_fault_polygons = (
             map_surface_names_to_fault_polygons
             if map_surface_names_to_fault_polygons is not None
@@ -224,6 +226,6 @@ def add_webvizstore(self) -> List[Tuple[Callable, list]]:
             store_functions.append((read_csv, [{"csv_file": self.well_pick_file}]))
         if self.field_outline_polygons_file_path is not None:
             store_functions.append(
-                (read_csv, [{"csv_file": self.field_outline_polygons_file_path}])
+                (get_path, [{"path": self.field_outline_polygons_file_path}])
             )
         return store_functions