docs: def hexbin(x, y, color="purple", **kwargs):
      """Seaborn-compatible hexbin plot.
  
      See also: http://seaborn.pydata.org/tutorial/axis_grids.html#mapping-custom-functions-onto-the-grid
      """
      if HAS_SEABORN:
          cmap = sns.light_palette(color, as_cmap=True)
      else:
          cmap = "Purples"
      plt.hexbin(x, y, cmap=cmap, **kwargs)