Update app.py

app.py

@@ -257,11 +257,11 @@ def create_heatmap(
         if heatmap_df.empty:
             return go.Figure().update_layout(title="Shortage Risk Heatmap (No Data)")
         
-        # Custom colorscale: red at 0%, green for values > 0% to 100%
+        # Custom colorscale: red at 0%, blue shades for values > 0% to 100%
         custom_colorscale = [
-            [0.0, 'rgb(255, 0, 0)'],    # Red at exactly 0%
-            [0.001, 'rgb(0, 128, 0)'],  # Dark green just above 0%
-            [1.0, 'rgb(0, 255, 0)']     # Light green at 100%
+            [0.0, 'rgb(255, 0, 0)'],      # Red at exactly 0%
+            [0.001, 'rgb(0, 0, 139)'],    # Dark blue just above 0%
+            [1.0, 'rgb(135, 206, 250)']   # Light blue at 100%
         ]
         
         fig = go.Figure(data=go.Heatmap(