you might want to get that professionally done. if you have dark hair, it might not show up like that, and you would need to bleach it. if you do that on your own, it could end up going green though. store bought stuff isn't that great, and things could go wrong if you don't know what you are doing.

at the same time, my sister is a hair dresser and bought what said and shown to be a dark purple at an actual supply store, but it ended up being a fuchsia pink color instead when we put it in. she bleached parts of my hair since mine is brown. i hated it. if it was done at an actual hair dresser, they would have had to fix it for free at least. i had her fix it a bit after but never ended up how i wanted.

i hope you do end up getting the color you want though and have a good birthday.