The St. Kitts & Nevis flag emoji shows a green triangle in the upper left corner and a red triangle in the lower right corner. Diagonally centered is a black stripe outlined with thin yellow lines and 2 five-point stars centered on the black line.
Your heart is black, you have no soul. A black heart is one commonly used when talking about a love for something dark, evil, and bad. It can also just be used to show your love for the color black. The color of opal. Alternatively, a goth heart.