code: def translate_colorname_to_ansi_code(colorname, offset, colormode, colorpalette):
      
      try:
          red, green, blue = colorpalette[colorname]
      except KeyError:
          raise ColorfulError('the color "{0}" is unknown. Use a color in your color palette (by default: X11 rgb.txt)'.format(  # noqa
              colorname))
      else:
          return translate_rgb_to_ansi_code(red, green, blue, offset, colormode)
docs: Translate the given color name to a valid
      ANSI escape code.
  
      :parma str colorname: the name of the color to resolve
      :parma str offset: the offset for the color code
      :param int colormode: the color mode to use. See ``translate_rgb_to_ansi_code``
      :parma dict colorpalette: the color palette to use for the color name mapping
  
      :returns str: the color as ANSI escape code
  
      :raises ColorfulError: if the given color name is invalid