HOW TO BRIGHTEN DULL BLONDE HAIR

I was wondering if anyone can give me advice on how to brighten up my now dull very light beige blonde hair?? I have been doing my own color at home and now have a mish-mosh of colors in my hair. The root area is a brassy/coppery color which I cannot get rid of for the life of me. I colored it recently with a Medium Ash Blonde Clairol Natural Instincts Semi Permanent hair color to try to get rid of the brassiness. It did not work too well and left some parts of my blonde hair looking a little gray/white and the rest of my hair is just faded and dull looking. I was wondering if there is any color at Sally's that would brighten up my blonde without making it too Golden/Red. I would like a nice bright beige or champagne blonde. Would I use a 10 Vol developer since I just want to add a little color?

Also How can I go about this and get rid of the brassy root area?

Any advice would be greatly appreciated.
Marta

Thanks that is Great advice. Can I just do the color with 10 vol developer instead of the shampoo and leave it on say 20 minutes or so??? Also can you recommend a bright beige/champagne shade. You mentioned Sand is that kind of bright. I don't mean Gold. But just a bright shimmery beige or champagne or maybe even honey. I also used the shimmer lights and I think that is dulling it as well. How about the brassy roots. What do you recommend for those??? Do I have to do a different color or base to get rid of the brass???

Your advice is greatly appreciated.
Marta

THANKS FOR THE ADVICE. I FINALLY GOT THE COLOR TO A BRIGHTER SHADE BY MIXING PART COLOR PART SHAMPOO BUT NOW IT IS A LITTLE TOO LIGHT. MY ROOT AREA IS AUBURN COLOR (NOT MY NATURAL COLOR) WITH A DEFINATE LINE OF DEMARCATION. MY GOAL IS TO TONE DOWN THE BLONDE AS WELL AS BLEND IN ROOTS AS TO MAKE THEM LESS NOTICIBLE. WOULD USING A TONER DO THIS??? OR COULD YOU RECOMMEND ANOTHER PROCEDURE. ANY ADVICE IS GREATLY APPRECIATED.

MARTA

That sounds like a good idea. Did you paint it on pieces of the top layer of hair like you would highlights?? What level developer did you use. Is color gems a gel colorant?? Any advice is greatly appreciated as I am going to Sallys tomorrow.

Thanks a bunch
Marta