fix: Fix indexing for topic-color mapping

app.py

@@ -58,7 +58,7 @@ def draw_interactive_scatter_plot(
     if n_colors not in Pallete:
         Palette = AuxPallete
     p = figure(plot_width=800, plot_height=800, tools=[hover], title='2D visualization of tweets', background_fill_color="#fafafa")
-    colors = factor_cmap("label", palette=[Pallete[n_colors][int(id_)] for id_ in values_color_set], factors=values_set)
+    colors = factor_cmap("label", palette=[Pallete[n_colors][int(id_) + 1] for id_ in values_color_set], factors=values_set)
     p.circle("x", "y", size=12, source=source, fill_alpha=0.4, line_color=colors, fill_color=colors)
     p.axis.visible = False
     p.xgrid.grid_line_dash = "dashed"