Will washable splat hair dye come out in a pool?

It may depend on how porous your hair is, but, we did my daughter'shair, it came out a awesome color, and she went to Florida and was in pools constantly (five or six times a day!). It seemed to come out a bit the first time she came out of the pool, but never budged after that. As a matter of face, I am no looking for some color remover so we can try another color. It has faded just a shade or two lighter. It has been a month and a half. Good stuff. Hope this helps.