# File lib/gruff/base.rb, line 403
    def theme_greyscale
      # Colors
      @colors = [
        '#282828', #
        '#383838', #
        '#686868', #
        '#989898', #
        '#c8c8c8', #
        '#e8e8e8', #
      ]

      self.theme = {
        :colors => @colors,
        :marker_color => '#aea9a9', # Grey
        :font_color => 'black',
        :background_colors => 'white'
      }
    end