I can't edit my comment, but if you're interested in trying out a Dracula theme, check out https://github.com/hello-party/Gmail-Basic-HTML-Dracula https://githu

I can't edit my comment, but if you're interested in trying out a Dracula theme, check out https://github.com/hello-party/Gmail-Basic-HTML-Dracula https://github.com/hello-party/Gmail-Basic-HTML-Dracula Its still not perfect, but it does show potential for better themes for the basic HTML.