I am a true blonde, and I dyied my hair a litle brown... The box stated that it was a little natural brown (acorn). So I followed the box to the tee and my hair looks brown with green highlights. What can I do to get a quick fix. I have extremely healthy hair, but I am not sure what to do

Did u use a permanent or temp dye??
If you used a permanent one I'd call the hairdressers for some advice so you don't make it worse,dying again so soon could mess it up even more

When going from blonde to dark, you need to deposit another colour in before you actually put on the dye. Brown hair dyes are bluey greeny based therefore you get that green cast. You should have really applied a reddy colour on first (temp or semi would do), dry it in then apply the brown.

You will need to see a reputable hair colourist. They can help correct the correct.