So tomrrow I'm dying my hair Black and blue. I've done non-naturatl colring before, and it faded really fast. What brand of hair clolr should I use for the blue? What brand and where can I most likely buy it? Thanks! ^_^

So tomrrow I'm dying my hair Black and blue. I've done non-naturatl colring before, and it faded really fast. What brand of hair clolr should I use for the blue? What brand and where can I most likely buy it? Thanks! ^_^