Hi!
There are a couple of approaches you might take here.
The first is changing the template: right now it looks as though you are using the Default Events Template which is great, but sometimes the Default Page Template meshes a little better with certain themes. Could you try adjusting this (via the Events → Settings → Display admin screen)?
The second is to add some custom CSS via a tribe-events.css stylesheet (see our Themer’s Guide – and this section in particular – for details on setting this up). Within that file you could then add something like:
#tribe-events-content-wrapper { background: white }
To alter the background.
Does that help?