Is there a way to toggle Dark Mode on/off for individual apps in macOS Mojave?

Question

Is there a way in Terminal to toggle Dark Mode On/Off for an individual app without affecting the rest of the environment?

I use calendar on my Mac, and the appearance is dreadful. The rest of the apps look great in Dark Mode. I want to disable it JUST for that one app.

Answer 1

From Terminal, run this command:

defaults write com.apple.iCal NSRequiresAquaSystemAppearance true

To revert the change:

defaults write com.apple.iCal NSRequiresAquaSystemAppearance false