How do I turn black hair blue using a rinse.?

I want to color my weave. Right now it is black. I want to but blue and purple streaks in it.How do I turn black hair blue using a rinse.?
why?How do I turn black hair blue using a rinse.?
You either have to buy it that way or bleach it first, then dye it blue and purple. You can get everything at Sally's.
Don't it will run your hair. R-U-I-N- Y-O-U-R H-A-I-R-!!