This is an approximation I make it from scratch and eyeball:
1/2 Cup of Mayo 2 Tablespoons of: (Adjust to taste) Green Pepper Onion Celery (You can substitute Dried Celery flakes or Celery salt if you do not have fresh) Sweet pickle relish
1/2 to 1 Teaspoon of Worcestershire Sauce 1/2 teaspoon of salt
Stir together then add Ketchup to get the pink color you want. (Start with a 1 1/2 tablespoons and add to taste.