How do you dye you hair colors (pink or green, etc.) only for a week or so?

I wanted to dye my hair, but only for a week or so. How do I pull it off?How do you dye you hair colors (pink or green, etc.) only for a week or so?
Well if you have dark hair.. you'd have to bleach it (the area you want to be colored) first then by color fiend hair dye from hot topic. but stays in for more then a week. it stays in 6-8 weeks depends on how often you wash your hair and what type of shampoo you use. But if you just wanted it in for a week.. you'd have to by spray like you use on halloween. :]How do you dye you hair colors (pink or green, etc.) only for a week or so?
Alot of colored dyes tend to penetrate your hair better whenever you use a lightner such as bleach before the color.That will give you the best results for the color depending on your natural color.....but since you want it temporary I would not do that..If your hair is too dark it will not show the color at all..but if your hair is light enough you should see the color fine..there is no garuntee that the color will was out after a week so be prepared to make a commitment with it..I suggest and tell all of my clients to do a test strand underneath in the back of you head..good luck!!!!
go to sally's beauty supply and ask for colored hair dye for unbleached hair. it works on brunettes really well!
Go to a professional hair salon and ask for a demi permantent. It will last a week or so.
Those colors are extremely hard to get out of your hair if you use hair color. Go for a spray in color.
get not permanent hair - dye . try hot topic , they have a bunch of crazy colors .