In the top corner is Kagi Maps, there are two buttons. The X button to take you back to Kagi Search, and the info button which gives more info about Kagi Maps. The X button will stay dark no matter if you are using dark mode or light mode on Kagi. The info button will always stay light even if you use dark mode.
Personally, I don't really like the X button. I think it should be replaced with the navigation menu which you can see on other Kagi pages. The info button is nice, but should change depending on the theme you are using.