Help! My white bralette stained blue

Val

I don't know if this is the right place, but I was washing some clothes and my bralette caught some blue spots. I don't know how to get them out! I could remove a bit of the spots by washing it again but there are stains still!

It doesn't have any labels to know if I can wash it with bleach, plusnit has a lacy part that was stained as well.

What can I do?