An argyria is a condition caused by improper exposure to silver or its compounds, characterized by a blue-grey discoloration of the skin.

Argyria is gray discoloration of the skin. Cyanosis is a bluish discoloration of the skin, but sometimes is used for gray.

Argyria

Argyria is a rare condition caused by prolonged exposure to silver or silver compounds, resulting in a bluish-gray discoloration of the skin and mucous membranes. It is not harmful and primarily a cosmetic concern.

It is one of the characteristics of cholera but not always. The term for this is

argyria or commonly "Blue Death". It is caused by severe dehydration due to fluid loss. Some parts of the skin appear a light blue.