How am I supposed to override the dark and light background colors?

[heyalexnet]

I want to override the background color (currently using the default theme). Right now, I'm adding this snippet in an index.css file:

.dark .slidev-slide-content {
  background-color: #010747 !important;
}

But I'm sure there's a better way. How can I achieve that?

Also, doing it this way does not work with the PDF export: npx slidev export --dark. The slides are exported with the original dark color, not mine.