Hard water, with its high mineral content, can indeed affect hair color, but not necessarily by darkening it. While it can make dark hair appear darker due to the build-up of minerals, it's not a direct darkening effect. The minerals in hard water can make hair appear dull, dry, and weighted down, which might give the illusion of darker hair.
Hard water's main impact on hair color is causing fading and discoloration, particularly for lighter shades. Minerals like copper can oxidize and produce a green tint on light hair, making it appear more brassy or orange.
However, the effect of hard water on hair color varies depending on the specific minerals present in the water and the individual's hair type. Some people with hard water may experience no noticeable changes in their hair color, while others may see significant fading or discoloration.
