Okay, I have naturally light/medium brown hair. I wanted to try going blonde, so I went and got some permanent blonde hair dye. I dyed it once and it was an awful reddish blonde color, and I could tell the light color wasn't helping compliment my face at all. So I returned the rest of the blonde hair dye packages in exchange for brown. My mother told me to use a dark brown color, and picked out the dreaded permanent "ASH BROWN". I now know why it's called ASH brown. Because it turned my hair to a dark black. And my hairstyle just does NOT look good with it. I suggested to my mom to go get a dark blonde color to bleach it back to my brown color, but she said it would turn out a gross purple-red if I did so. I asked if other lighter brown hair dyes would work, but she said they would not lighten it in the least.

Today is Sunday and I have school off tomorrow, but I have school on Tuesday. Is there a product in stores I could buy to fix this by Tuesday? Browsing forums it seems that "One 'n Only Color Fix" is the way to go to fix this. Is this product sold at Salon's or Wegman's or K-Mart even?

If you want to go from brown to blonde, you must first lighten the hair to a yellow stage and then deposit the desired color. When you apply a permanent blonde hair color over dark hair, it will result in a brassy red/orange shade. Also, some dark hair colors tend to grab onto color treated hair, making it appear even darker. In order to go back to light brown, you will need to pre-lighten your hair before apply your selcted color. This hair coloring process should be attempted only by professionals.

Use head 'n'shoulders shampoo... it won't remove the colour completely but it will lighten it so if u commit yourself and get it light enough then you can deposit a medium brown or a chestnut brown tint on top of it.

Buy 2 bottles of head 'n' shoulders(I think its called Prell in the US)its an anti dandruff shampoo.
Wet your hair and apply a lot(a palmful) of the shampoo to your hair lather up and put a treatment bag (cling film if your stuck, seran wrap in the US?) wrap a towel around your head, leave for 60 minutes and rinse with really hot water(as hot as you can handle without hurting yourself). Repeat until your hair looks lighter or u run out of shampoo. :)

This works because head'n'shoulders is a hair colour nightmare(or dream in your case) it strips colour from the hair by shrinking the colour molecules which makes it easier for them to be washed form the hair shaft. After lightening the hair use a good conditioner to soften the hair.

Best of luck :)