drop down menu background color

i changed the text color to white and now the text in the drop-down menu istn’t readable due to its white bg. it shouldn’t be white in the first place, all other fields are transparent and i can’t find the css that is responsible. any ideas? here is the page:
http://www.lushatitlan.com/reservation/

thanks for helping!

http://wordpress.org/extend/plugins/contact-form-7/