color of Header with differents background colors

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Hello,
I can try to explain my problem, but I don't speak english very well.
In my work page (lacarrilloca.com) with fullscreen addons, I have different images with white, colors or black backgrounds. My problem is that I would like to put a black image in background, my site title and menu disappears, I want to put this menu in white only with some images.

I think it's code,
If you help me with the proccess of code, because my level of CSS is very bad :)

How can I do to put in some page the font menu and title in white color with black photo? And an others pages the font in black colors?

the code is the same for mobile layout and desktop layout?

Thanks you so much !!!
Have a good day

Dear @lacarrilloca
I understand. This is possible but not very easy to achieve if you do not know CSS and JQUERY.

Have a look here:
http://laythemeforum.com:4567/search?term=fullscreen colour&in=titlesposts

Maybe that helps!

Best!

Marius

Thank you for the link @mariusjopen
I have been working on the mobile version and I have managed to change in white, part of the nav.bar (work/photos/about) but not the site title.
Do you know why does it not work?

For the desktop is the same code?

Thank you!!!

Dear @lacarrilloca
on which page can I see your white navigation?

Best!

Marius

@mariusjopen for exemple in the mobile version, in work page, when you scroll horizontal you can see the white navigation (page.2/page.5) But the title stay in black color, I don't know why...

Thank you so much

Dear @lacarrilloca
have a look here:

body.fp-viewing-0-1 .mobile-title span {
    color: white;
}

Best!

Marius

@mariusjopen Thank you so much !!!! Have a good day :)