What would cause a dead body to be purple?

A dead body may appear purple due to a process called postmortem lividity, or hypostasis, which occurs when blood settles in the lower parts of the body due to gravity after the heart stops beating. This pooling of blood can create a purplish discoloration of the skin, particularly in areas that are not in contact with surfaces. Additionally, conditions such as bruising or certain medical conditions prior to death can also contribute to a purple appearance.