Appearance issue

Hi,

Im making a site and having a little problem with the appearance on few pages. The site I´m developing is http://plumbinganddrainage.com.au

Im building the site with pagebuilder and the appearance issue can be seen example on this page:
http://plumbinganddrainage.com.au/maintenance-plumbing/

I want to remowe either

1. the grey area under the main header
(Maintenance Plumbing
Home / Maintenance Plumbing)

2. The white area under that grey

Thanks for your help and let me know if I was unclear 🙂

-F