What does a blue colored pumpkin signify in Halloween?

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Answer: Food-allergen-friendly
More information: During the celebration of Halloween, homes that offer Food-allergen-friendly treats do so by placing a blue or a teal colored pumpkin at their doorstep. These homes offer allergy-free treats instead of the usual candies. Allergy-free treats are safe for trick-or-treaters who might be allergic to certain types of food.

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