# File lib/rouge/theme.rb, line 50
    def self.palette(arg={})
      @palette ||= InheritableHash.new(superclass.palette)

      if arg.is_a? Hash
        @palette.merge! arg
        @palette
      else
        case arg
        when /#[0-9a-f]+/i
          arg
        else
          @palette[arg] or raise "not in palette: #{arg.inspect}"
        end
      end
    end