Traditionally, in Feng Shui, the door is painted red. Since the house in feng shui is sometimes seen as the body, the door is considered the tongue and when it sticks out, it’s like the red carpet at the Oscars; hot and fiery and where a lot of positive energy can find you. However, it’s not always pleasing to the eye to use red since it might not compliment the exterior palette. The door is the point of entry and in my opinion, it should be bright and happy, something that lifts your heart to the sky. Since I’m not a traditionalist and always consider how the heart feels, I would advise you to consider how a black door might feel to you. And if it feels right, go for it.