Pages with white menu background

Hello again,

I would like to ask why the menu on these links cant be seen: http://www.mysterycinema.org/pages/services-wide/ http://www.mysterycinema.org/works/portfolio-full-width-video/
How do I set the background color of the menu on these pages to transparent or even a dark background?

Also, how can you set a different layout menu for a specific page? I have already set a menu.

Thanks in advance!