code: def get_colorscheme(self, scheme_file):
          
          scheme = get_yaml_dict(scheme_file)
          scheme_slug = builder.slugify(scheme_file)
          builder.format_scheme(scheme, scheme_slug)
  
          try:
              temp_base, temp_sub = self.temp.split('##')
          except ValueError:
              temp_base, temp_sub = (self.temp.strip('##'), 'default')
  
          temp_path = rel_to_cwd('templates', temp_base)
          temp_group = builder.TemplateGroup(temp_path)
          try:
              single_temp = temp_group.templates[temp_sub]
          except KeyError:
              raise FileNotFoundError(None,
                                      None,
                                      self.path + ' (sub-template)')
  
          colorscheme = pystache.render(single_temp['parsed'], scheme)
          return colorscheme
docs: Return a string object with the colorscheme that is to be
          inserted.