class Rainbow::Presenter

def method_missing(method_name, *args)

Such as #aqua, #ghostwhite.
We take care of X11 color method call here. 
def method_missing(method_name, *args)
  if Color::X11Named.color_names.include?(method_name) && args.empty?
    color(method_name)
  else
    super
  end
end