Dark Mode for Emails (not just the UI)
When setting dark mode in Protonmail, White email backgrounds look weird. The dark themes can be more consistent with dark email backgrounds.
To be concise, do you mean that the background of the body field, of the email, and the text during composition should match the selected theme?
If so, I concur, because the theme "Monokai" is already synthwave awesome... It'd be even more awesome if the background was dark blue and the text was pink.
However, if you mean that all incoming emails should be changed to match our selected theme, I would have to disagree.
Although, if there was an option to view all incoming emails as plaintext, and that option served as a requirement to view all emails in the selected theme, that would be fantastic.