The hair dye I use (blue green pink purple red) comes out whenever my hair is wet?

all semi permanent hair dyed bleed when in contact with water, especially hot/warm water. try using arctic fox or directions. and use cold water (unless you like ice cold water, wash your body seperatly, and them use the shower head to just wash your hair)

if you want to go the extra mile, you can add a little drop of each colour into seperate conditioner containers, and sepereate the hair colours, and use that. applying the conditioner with the little bit of dye will help put some colour back in after using shampoo. having coloured haircan be quite difficult.

Did you use the dye properly? It shouldn't be coming out that much.

Go to Sally Beauty or a salon or place that sells dyes and see what's out there.