Nav bar-Menu color change according to page color

[georgiaharizani]

Hello everyone,
Is there a way to have my menu background color change with the page background color?
My main site has a white background so the menu is white.
https://georgiaharizani.com/3651-calendar
On the projects page I have a project with an all black background and I would like for the menu to be black (with white letters).
The code below works for changing the nav bar color but not the buttons, so they cant be seen atm.
Thank you,
Georgia

Re: Background color on header

[Richard]

Dear @georgiaharizani

What was the link to the page that you would like the menu background black?

Best
Richard

[georgiaharizani]

Hi Richard,
Just any project really. I would like to change the background for example here: https://georgiaharizani.com/2021-weekly-index to black and have menu buttons and text be white.
An ideas?
Thanks <3