I find dark/black modes almost unreadable, but standard light modes are so stark. I would find it extremely helpful to be able to choose a sepia mode instead for improved reading comfort in the app. Thanks!
At least on iOS there is a sepia mode (Preferences > Light Theme > Sepia), or also available in Current Theme if you don’t have switching enabled. You don’t mention what platform you are using — the iOS and Android apps are not the same.
unfortunately I’m on android, and the themes available in the app are auto, light, dark, and black, no sepia option.