What is a characteristic complexion deviation that can result from gangrene or strong injection of embalming fluid?

A gray complexion deviation can occur as a result of gangrene or the injection of embalming fluid that has not been properly balanced or has reacted negatively with the body's tissues. Gangrene is a condition that causes the death of body tissue due to a lack of blood flow, which can lead to a grayish discoloration as the tissues decay.

The strong injection of embalming fluid can also lead to a gray complexion, particularly if there is an over-embalming or if the fluid interacts unfavorably with the body’s natural chemistry. This reaction can result in the skin appearing ashen or gray due to changes in the body's oxygenation and the decomposition processes caused by the embalming fluid.

In contrast, the other complexions—red, yellow, and blue—are typically associated with other conditions or injection issues unrelated to gangrene or the specific effects of embalming fluid.