Styling email digest

I’m looking at the digest email on my forum, and since my logo is on a dark background (white logo),
it doesn’t come out great in the email header which has a light grey background.

I’d settle for providing a dark-on-light logo version for the email, but ideally we’d specify a color/style for the email (header at least).

I was looking at the code on CSS customisation for RTL:

Is this on the development roadmap, and what would the project devs suggest about this issue? Would another setting be desirable?

(Edit: hmm. a search for “styling email” or the auto-search didn’t catch the dupe.)

Let’s keep this conversation in one place: https://meta.discourse.org/t/additional-logo-for-emails/11035