Place ½ cup mayonnaise, 3 tablespoons ketchup-style chili sauce, 1 tablespoon minced white onion, 1 teaspoon prepared horseradish, ½ teaspoon Worcestershire sauce, ½ teaspoon smoked paprika, ½ kosher salt, ¼ teaspoon dry mustard, and ¼ teaspoon black black pepper in a medium bowl and stir to combine. Taste and add more kosher salt or black pepper as needed.