Help with changing this color on Mobile Version!

Help please! Can anyone help me with changing this color on the mobile version when the hamburger menu is clicked on? I have clicked on the “hover” and the “pressed” interactions on the element itself and I don’t see this purple color or where to change it to gold? Can anyone advise on this please?
I have attached a screenshot and my read only link. Thank you!

You’ll select the element.
Go to “Settings” and click “Show” to see these properties.
Then return to the style panel to change them.