How do I remove clothing dye stain from a stone floor?

We have light brown stone tiles for my room. It was raining hard one day so my Mom hung the clothes up on the temporary line in my room (we don't have a dryer). So there was this bright magenta dress that was dripping wet and then the colour dripped down to the floor. I only noticed it after it was all dry. now how do I get it off the floor!?