Accenture Systems Integration Dress Code?

Hello all,
I'll be starting with Accenture in the Philadelphia office as a systems integration analyst just out of school, however I won't begin work until the fall. I thought I might get a head start on buying some clothes for work, however I have no idea what the dress code is as I have heard different things from different people. Some people have said the dress code is business casual (i.e., khakis and button down, no ties), while others have told me that it depends upon what employees where at the client site, and that the consultants generally dress at the same level as those employees. If anyone who has worked at Accenture before knows the answer to this, I would really appreciate it. I'm sure the exact answer depends on many factors, but I wanted to be able to get some basics bought before my start date. Thank you.