I’ve been in contact with the creator of this website, Nathalie, to get feedback on different designs for the responsive site.
The first design needed transparency in the header to make the background more visible.
The second design follows the style of the original design and has more transparency but the width of the content covers most of the background.
The third, and most recent design, has transparency in the header and I’ve added more padding to the content to make the background visible around the sides.