Removing blue from hair can be a challenging task, but it is possible with the right techniques. Blue hair dye is semi-permanent, which means that it will gradually fade over time. However, if you want to remove the blue color more quickly, there are a few things you can do.
One option is to use a color remover. Color removers are available at most beauty supply stores. They work by breaking down the dye molecules in your hair, making it easier to wash away. However, it is important to follow the instructions on the package carefully, as color removers can be harsh on your hair.