Ash-gray of hair is a term used to describe hair with a grayish tint. There are many different synonyms that can be used to describe this hair color. Some of the most common ones include silver, gray, ash, smoke, pewter, and slate. These words all evoke the same general impression of a color that is not quite white or black, but rather a muted, somewhat smoky shade. Other synonyms that could be used to describe ash-gray hair include steel, gunmetal, and iron. Each of these words conveys a slightly different shade or tone of gray, allowing the writer or speaker to choose the word that best fits the context.