One thing we’re working on is to update MoneyWell 3 to support Dark Mode on macOS Mojave, and that was supposed to be released at some point in the future.
Unfortunately MoneyWell 3.0.9 enabled Dark Mode a little before it was ready. If you’ve seen it, you’ll have noticed some problems.
If you are using MoneyWell 3 and are a fan of Dark Mode but don’t want to disable it to effectively use MoneyWell, you can find instructions on how to force MoneyWell back to Light Mode for now here: MoneyWell Dark Mode Bug