protected function addColor(
        /*# string */ $text,
        array $definition
    )/*# : string */ {
        $fgColor = $definition[0];
        $bgColor = $definition[1];
        $deColor = $definition[2];
        $prefix  = $fgColor . $bgColor . $deColor;
        $suffix  = $prefix ? self::DECO_END : '';
        return $prefix . $text . $suffix;
    }