code: func Printf(format string, a ...interface{}) (n int, err error) {
  	return fmt.Printf(Color(format), a...)
  }
docs: // Printf is a convenience wrapper for fmt.Printf with support for color codes.
  //
  // Printf formats according to a format specifier and writes to standard output
  // with support for color codes. It returns the number of bytes written and any
  // write error encountered.