Pick three colors, see them on Discord, and download a theme you can submit.
Backgrounds, surfaces and text.
Buttons, switches and your reactions.
@mentions and messages that mention you.
Backgrounds & Text
Accent
Mentions
Title case, like Rosie Pink.
Theme id theme-author.my-theme
To tweak it by hand, read how themes work. With the debugger connected, ubd dev reloads the theme on your phone each time you save bundle.json.