Orange: Orange is the most prominent color of Halloween and represents the harvest season and fall foliage. It is often associated with pumpkins, which are a symbol of Halloween. Many Halloween decorations, such as pumpkins, jack-o'-lanterns, and autumn leaves, feature this color.
Black: Black is often used to represent the darkness of the night and is associated with mystery, the unknown, and even spooky or scary elements. It's a common color for costumes, especially those of witches, vampires, and other supernatural creatures.
Purple: While not as common as orange and black, purple is sometimes used in Halloween decorations and costumes. It can symbolize magic, mysticism, and the supernatural.