Answer:
Pallor mortis
Step-by-step explanation:
Pallor mortis (pallor meaning "pale," mortis meaning death) is the first stage of death in which the circulation of blood has stopped due to capillary collapse and the cessation of the heart's electrical activity pumping oxygenated blood to the tissues. The first word in the phrase gives most of the information necessary as outside of death, pallor is also used to describe the pale appearance of skin sometimes as a result of poor circulation.
Livor mortis (livor meaning "black and blue or bruise"), or in the case of this question lividity, is the second stage in which a portion (or portions) the skin has a blue-purple hue as a result of gravity pooling the blood in the vessels closest the earth's surface.
Algor mortis as the third stage of death does not refer to the deceased patient's appearance but rather their temperature; algor meaning "cold." The patient's body temperature begins to change to match that of the room or climate they are in.
Lastly, rigor mortis does not refer to temperature or appearance, instead describing the rigidity of the deceased patient; rigor meaning "stiff." This is the fourth and final stage before the body begins to break down, occurring because the adenosine triphosphate (ATP) energy source necessary protein separation to occur within muscle cells is cut off from oxygen supply because of the previously mentioned cessation of blood flow. Protein separation does occur during decomposition many hours later.