Jack Of Hearts Meaning In A Cartomancy Or Tarot Tarot GuruKnave for Black is a playing card in a deck of cards. It signifies a representation of enigma, might, and perception. The Ace of Black might also indicate a person of dark complexion or an individual that is proficient in a particular field. This symbol often carries an air of being enigma and may signify the importance of trusting gut feelings when dealing with a particular scenario.