What do halloween colors, black and orange, signify? orange stands for harvest, and black signifies death

Halloween's two symbols are orange pumpkins and black cats. The concept of Halloween is based on Celtic folklore. Black is seen as the symbol of death and orange reflects the colors of the fall harvest. Halloween was originally a harvest festival. The color orange is derived from the fall leaves and the pumpkin. Orange is also seen as a symbol of strength and endurance. Halloween was also a festival of the dead. This explains the use of the color black as one of Halloween's colors.