Color of registration form fields

We're getting really close to launching the new site, and I'm very excited!

I don't know why the form fields for the registration page are showing up bright yellow, but I'd like to change that and can't figure out where to do it.

Take a look: http://www.larchmontgazette.com/wp27...ction=register

I'm using BM Custon Login, but there is no option in the plugin for the field color.