Toss the cabbage, carrots, purple cabbage, parsley, and green onions together in a bowl.
In a smaller bowl, combine the vinegar, lemon juice, mayonnaise, sour cream, sugar, Dijon, honey, celery salt, sea salt, and freshly cracked pepper, to taste. Whisk until well combined.
Pour the dressing over the salad and toss until evenly coated. Serve.