code: public function isColorEnabled($stream = \STDOUT)
      {
          return $this->color === null ? Console::streamSupportsAnsiColors($stream) : $this->color;
      }
docs: Returns a value indicating whether ANSI color is enabled.
  
  ANSI color is enabled only if [[color]] is set true or is not set
  and the terminal supports ANSI color.
  
  @param resource $stream the stream to check.
  @return bool Whether to enable ANSI style in output.