Can I turn to Dark Mode only for specific apps in macOS Mojave?
There's a command that works for this:

defaults write &lt;Bundle-Identifier&gt; NSRequiresAquaSystemAppearance -bool yes


It's explained here: https://www.tekrevue.com/tip/exclude-app-dark-mode-macos-mojave/

If you don't know the app's bundle id, you can query it using AppleScript, which you can run from the command line with osascript:

osascript -e 'id of app "&lt;App-Name&gt;"'