menu different background color than logo

Worked this time ??
The blue as you are referring to (which is my guess above the green) is your banner image:

https://bureaudactis.nl/wp-content/uploads/2016/04/full-width-banner.jpg

The display: none; on your header-footer is actually working. So you will need to crop your banner image to take the blue part off.

O wat stom van mij!!

(that’s means: “I am so stupid!” in Dutch)

Thank you so very much for all the time you gave to me, I am very grateful!
Greetings from amsterdam, ms

No worries ??