ColorRepresentation example

        if (\strlen($var) > 32) {
            return;
        }

        $trimmed = \strtolower(\trim($var));

        if (!isset(ColorRepresentation::$color_map[$trimmed]) && !\preg_match('/^(?:(?:rgb|hsl)[^\\)]{6,}\\)|#[0-9a-fA-F]{3,8})$/', $trimmed)) {
            return;
        }

        $rep = new ColorRepresentation($var);

        if ($rep->variant) {
            $o->removeRepresentation($o->value);
            $o->addRepresentation($rep, 0);
            $o->hints[] = 'color';
        }
    }
}