I haven’t seen one so dark but the purple one could be something could toner which is used in bleached hair to take away some of the “yellowness”. She may use it from time to time in the future to maintain that tone. The first time I bleached my hair, I was using toner that could be used as shampoo but this was before I found out that you aren’t meant to wash your hair with shampoo everyday so my white hair had a slight blue/purple shade