You may have seen teal pumpkins while out trick-or-treating before. This pumpkin trend was started by the Food Allergy Research & Education organization to help remind us that some kids have serious food allergies. With a holiday that centers heavily on pumpkin color meaning candy, it’s important to remember keep in mind that not every kid can eat every treat. Whether you choose to display one or not, advocates hope the conversation around blue pumpkins pushes households to adapt their homes for a more inclusive Halloween.

According to Newsweek, this unofficial initiative started last year with Alicia Plumer’s viral post. She’s the mother of a child with autism and was inspired by the Teal Pumpkin Project. They may be wearing a badge or carrying a bag with a sign that indicates they are autistic. An initiative originally started by Autism Speaks, blue-colored buckets may mean that the child carrying it is on the autism spectrum and may need a grown-up’s help trick-or-treating. It could also mean that the trick-or-treater may not want to make eye contact, chat, or say, “Trick or treat!” or “Thank you.” All in all, it’s meant to signify that support, patience and grace are appreciated for trick-or-treaters on the spectrum and their families.

The practice was started by the Pink Pumpkin Project, a non-profit based in New York. 3.8 million women in the U.S. have a history of breast cancer, so spreading the word about organizations like the Breast Cancer Research Foundation is crucial. Just as a pink ribbon symbolizes breast cancer awareness, so does a pink pumpkin. Halloween falls within Breast Cancer Awareness Month, and many who have pink pumpkins may know a breast cancer survivor or are one themselves. The non-profit “Pink Pumpkin Patch Foundation” has helped facilitate donations to organizations involved in breast cancer research based on the sales of seed and fruit from naturally pink pumpkins. Popularized through the “Teal Pumpkin Project,” this color is used to make trick-or-treating safer and more inclusive for children with food allergies.

Just as a pink ribbon has come to represent Breast Cancer Awareness, so now does a pink pumpkin. If you see a house with a pink pumpkin outside its door, this could mean that someone inside is either a survivor, has been affected by breast cancer, or is offering a symbol of solidarity to those going through a diagnosis. In terms of energy, blue pumpkins indicate a rare energy since they themselves are rare. High in beta-carotene, fiber, vitamins A and C and potassium, blue pumpkins can also be cooked. They’re most often used for baking, boiling, steaming and roasting but since they’re on the sweeter side, Australian Blue pumpkins are usually used for pie fillings, cakes and scones. Those carrying a purple pumpkin bucket are signaling they are a trick-or-treater with epilepsy.

Definitely the most popular and well-known pumpkin color, orange is the traditional color of pumpkins during the fall season. Historically, most jack-o-lanterns and as such, orange and black have become the unofficial colors of October 31st over time. If you’re looking to carve, paint or decorate a pumpkin, the most standard color is orange.

The most traditional pumpkin color, you’ll find orange pumpkins at almost any pumpkin patch come autumn. If you spot an orange pumpkin at the patch, it’s ripe and ready to be picked. But these aren’t just for displaying on your fall-themed porch; orange pumpkins are also very versatile in the kitchen.

Of all the colored pumpkins on display, this may be the single most recognizable shade for families trick-or-treating across the nation. The high visibility around teal pumpkins — which have become a symbol of comfort for those facing foodborne allergies — comes after many years of awareness and education efforts by those whose health is threatened by popular Halloween candy and chocolate products. For Priscilla Hernandez, the promise of a fun, family-filled night of meeting neighbors while trick-or-treating ended up dashed when she realized her son Zacky, now 9 years old, had severe aversions to almost every kind of Halloween treat. For instance, homes that display teal pumpkins outside their door are signaling that they have non-food treats, or that they may have candy that is “allergy-friendly” for those trick-or-treaters who suffer from food allergies. Utilizing the color teal is part of the Teal Pumpkin Project, which was started to raise awareness and inclusion for kids with such hypersensitivities. Kids who carry a teal pumpkin likely suffer from some sort of food allergy.