Update app.py

app.py

@@ -587,7 +587,7 @@ 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:
+        if df_combined_t[df_combined_t.columns[2]].values[0] == 0:
             for i in range(len(colour_df)):
                 colour_df[[i][1]] = 'white'