MCRs Dead Angel's blog

I'm dying my hair blue with semi permanent dye, my hairs naturally ginger and my friends say to get it the colour I want I would need to bleach it, but I'm only doing it as on friday I'm dressing up as Ramona Flowers at school, I'm not planning on keeping it in and it would also get rid of the natural colour so I wouldn't be able to go back.
So my question is that if I dye my hair straight to blue from ginger will it turn out fine?