answer:I work at a beauty supply store and have also worked in a hair salon. I’ve had my hair dyed purple, pink, red, green, you name it. What I would recommend you use is Jean’s Color by Alfaparf Milano, sold at any National Salon Resources, if you don’t have an NSR near you Joico/Vero K-pack Color Intensity has great semi permanent colors, now available at drugstores and wal marts. If you have dark hair and don’t want to bleach your hair use a dark hair color, you can find many different brands at Sally’s Beauty Supply, however I warn you, most people that work at a Sally’s Beauty Supply don’t know s*** about anything in their stores, so figure out want you want and then get it, don’t ask them to help you. If I were to do this to my hair I would pin up the hair I don’t want colored and I would put it on the top of my head. Then I would take the purple I was using and put it in an applicator bottle like this . Then I would (carefully so you don’t get any color where you don’t want it) put the color on my hair like a shampoo, and make sure you get every strand on hair evenly, it’s nice to have a friend there to help you and tell you where you may have missed a spot. Then let it sit, normally bright colors will take a little longer to process than a black or a brown so I’d say about 30–45 min if you’re not using heat. Then wash out the color from your hair and ta-da! You’ve got the look you want! After that don’t wash your hair for a day or two so your color grips the hair more. I know it sounds disgusting but it’s worth it, get a dry shampoo and put your hair up in a shower cap and just wash your body not your hair. I hope this works for you! If you have any other questions about your hair ask me! I’m very knowledgeable in hair care and hair products!