Update app.py

app.py

@@ -587,6 +587,9 @@ def server(input, output, session):
         col_1_colour = [colormap(norm(x)) for x in list(((df_combined_t[df_combined_t.columns[0]].values) / (df_combined_t[df_combined_t.columns[1]].values)))]
         colour_df = pd.DataFrame(data=[col_1_colour,col_2_colour,col_3_colour]).T.values
 
+        if colour_df[[0],[2]] == 0:
+            colour_df[colour_df.columns[1]] = 'white'
+        
         colour_df[[0],[0]] = 'white'
         colour_df[[1],[0]] = 'white'
         colour_df[[0],[1]] = 'white'