Lock screen shell not in dark mode / specific theme

I notice that my shell on my lock screen wasn't the same theme was when I'm logged into my user. I was wondering if that is changeable into a dark mode or even a specific shell theme that I have downloaded.

Things I've tried to change to dark mode:

Edit the stylesheet in /usr/share/gnome-shell/modes/ubuntu.jsonfrom

{ "parentMode": "user", "stylesheetName": "Yaru/gnome-shell.css", "themeResourceName": "theme/Yaru/gnome-shell-theme.gresource", "debugFlags": ["backtrace-crashes-all"], "enabledExtensions": ["", "", "desktop-icons@csoriano"]
}

to

{ "parentMode": "user", "stylesheetName": "Yaru-dark/gnome-shell.css", "themeResourceName": "theme/Yaru/gnome-shell-theme.gresource", "debugFlags": ["backtrace-crashes-all"], "enabledExtensions": ["", "", "desktop-icons@csoriano"]
}

However, this didn't work.

Thanks a lot!

Know someone who can answer? Share a link to this question via email, Twitter, or Facebook.