**Core Concept**
Hypothermic death is a unique condition characterized by a body temperature below 35°C (95°F). Postmortem lividity, also known as livor mortis, is the discoloration of the skin due to the pooling of blood in the dependent areas of the body after death.

**Why the Correct Answer is Right**
In hypothermic death, the blood vessels constrict due to the cold temperature, which reduces blood flow to the peripheral tissues. As a result, the blood pools in the central veins, leading to a characteristic bluish-purple color of the skin. This is in contrast to the usual red or purplish discoloration seen in normothermic deaths.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it does not take into account the unique physiological changes that occur in hypothermic death.
**Option B:** This option is incorrect because the color change in hypothermic death is not due to the breakdown of hemoglobin, but rather due to the constricted blood vessels.
**Option C:** This option is incorrect because it is not specific to hypothermic death and can be seen in other conditions as well.

**Clinical Pearl / High-Yield Fact**
In hypothermic death, the color of postmortem lividity can be an important clue in determining the cause of death, especially in cases where the body has been exposed to cold temperatures for an extended period.

**Correct Answer: B. Bluish-purple.**