How to manage the export HTML file body background?

[tianfanghan]

I created my own theme, and import the default theme. When I export a html file, the html body background always be black, so I wonder if I can change the default body background color?
(NOT section background color.)

[tianfanghan]

Bye the way, thanks a lot for the beautiful work, we love it.

[yhatt]

UPDATE: The latest Marp CLI v1.5.0 follows the update of the base framework Marpit. It can style the slide container through ::backdrop CSS selector.
https://marpit.marp.app/inline-svg?id=backdrop-css-selector

Now you can change the black backdrop via CSS (working in both of theme CSS and Markdown inline style):

<style>
::backdrop {
  background-color: #448;
}
</style>

[tianfanghan]

amazing