Confused about Styling Hamburger Menus

Here’s the what the top of my page looks like, with hamburger menu at the upper right.

If I go into preview mode in Webflow and click on the hamburger menu, I get this:

All well and good.

And if I tap on the “Navigation Items” div in the Webflow navigator I can go to the spacing module in Webflow on the right and, for example change the background behind the menu items when they are displayed, after I tap on the hamburger icon.

But how do I change the background (currently) of the menu button, for example, when the navigation menu is displayed? I’ve looked at all the different states for that class and I can’t figure out where the grey is coming from.




Here is my site Read-Only: LINK
(how to share your site Read-Only link)