Headings Colors Theme Variants

[C41M50N]

I am just wanting to know if there is a reason why the Headings colors don't have light and dark variants (within Style Settings) like some of the Typography colors do? Is this something that you would be open to a PR for, or would you rather have users just manually adjust the CSS to their needs? The reason that I want this feature is because I write in Dark Mode, but export to PDF which is of course in Light Mode. Let me know your thoughts. Thanks!