Want to dye my hair with Manic panic blue dye?

Hi, I hate to tell you this but Manic Panic will not show up on your medium brown hair. You need to bleach out pieces if you want to really see the color. The brand Manic Panic is a good brand of color if you want hi fashion or punky colors, BUT this color is only temporary. Meaning it will only be bright and rich for like two weeks. And that's if you wash with cold water to keep from fading. The reason is this color line is more like a stain that a permanent hair color. It only colors the outside of the hair and doesn't penetrate the core of the hair. Also it likes to stain pillow cases while you sleep lol! Hope this helps, good luck!