diff --git a/app/logic/image_processing.py b/app/logic/image_processing.py
index b4357d5..8fd7e41 100644
--- a/app/logic/image_processing.py
+++ b/app/logic/image_processing.py
@@ -262,16 +262,19 @@ class ImageProcessingMixin:
                     draw.point((x, y), fill=(255, 0, 0, alpha))
         merged = Image.alpha_composite(base, overlay)
         outline = ImageDraw.Draw(merged)
+        accent_dark = (255, 215, 0, 200)
+        accent_light = (197, 98, 23, 200)
+        accent = accent_dark if getattr(self, "theme", "light") == "dark" else accent_light
         for shape in getattr(self, "exclude_shapes", []):
             if shape.get("kind") == "rect":
                 x0, y0, x1, y1 = shape["coords"]  # type: ignore[index]
-                outline.rectangle([x0, y0, x1, y1], outline=(255, 215, 0, 200), width=3)
+                outline.rectangle([x0, y0, x1, y1], outline=accent, width=3)
             elif shape.get("kind") == "polygon":
                 points = shape.get("points", [])
                 if len(points) < 2:
                     continue
                 path = points if points[0] == points[-1] else points + [points[0]]
-                outline.line(path, fill=(255, 215, 0, 200), width=2, joint="round")
+                outline.line(path, fill=accent, width=2, joint="round")
         return merged
 
     def compute_stats_preview(self):
@@ -439,12 +442,15 @@ class ImageProcessingMixin:
             except Exception:
                 pass
         self._exclude_canvas_ids = []
+        accent_dark = "#ffd700"
+        accent_light = "#c56217"
+        accent = accent_dark if getattr(self, "theme", "light") == "dark" else accent_light
         for shape in getattr(self, "exclude_shapes", []):
             kind = shape.get("kind")
             if kind == "rect":
                 x0, y0, x1, y1 = shape["coords"]  # type: ignore[index]
                 item = self.canvas_orig.create_rectangle(
-                    x0, y0, x1, y1, outline="yellow", width=3
+                    x0, y0, x1, y1, outline=accent, width=3
                 )
                 self._exclude_canvas_ids.append(item)
             elif kind == "polygon":
@@ -455,7 +461,7 @@ class ImageProcessingMixin:
                 coords = [coord for point in closed for coord in point]  # type: ignore[misc]
                 item = self.canvas_orig.create_line(
                     *coords,
-                    fill="yellow",
+                    fill=accent,
                     width=2,
                     smooth=True,
                     capstyle="round",