In a large mixing bowl, combine the shredded green cabbage, shredded carrots, and shredded red cabbage.

In a separate bowl, whisk together the apple cider vinegar, granulated sugar, salt, black pepper, and olive oil until well combined.

Pour the dressing over the cabbage mixture and toss until all the vegetables are well coated. Let it sit for at least 10 minutes before serving to allow the flavors to meld.