My friend and I want to dye our natural virgin hair Shocking Blue by Manic Panic. The problem is, I have dark hair and she has a medium brown color hair. We want the dark blue to last at least a month or longer, but we're not sure. I've done research and found out that if we bleach, we won't get our original color back, and once it fades it'll be turquoise and then later, white/blonde. We would only want to bleach because it makes the color more vibrant. But then again, bleaching damages and we wont get our original color/

Pros:

~Makes color vibrant

~Dyed color lasts longer

Cons:

~Damages hair

~Will have to constantly dye to keep hair from turning white

What should we do?