I used a darker shade of permanent brown color. I want to lighten it right away, using an ash blonde. Will I damage my hair doing permanent treatments 2 days in a row?

Yes you will damage your hair. Using an ash blond will not lighten it anyway.

NO I would not it would probably go green with the combination of what you have on it now and what you want to put on. No don't do it, it will ruin it.

NO i would not it would probably go green with the combination of what you have on it now and what you want to put on. No dont do it, it will ruin it.
You are correct bubbles, it will probably turn green.