There is no way to "remove" the proxide from the hair unless you cover over it. =(  Since peroxide bleaches the hair, the only way to cover it is to use a dye of some sort.  I have dyed my hair many colors over many years, so I can suggest a semi-permanent color for this situation.  This way, the hair can gradually go back to its original color.

I have heard of brunettes using a permanent color to mask, but their strands end up turning black.  Be very careful if you wish to do this at home.

When in doubt, ask a professional.  Your hair will get back on track /hug.

No problem =) it happens to all of us hehe.