I had a play and worked it out by myself ![Smile :)]()
The key is /etc/lightdm/pi-greeter.conf I edited this file as below, I copied the wallpaper and inverted it using GIMP then save the new file with dark into the same directory as the original wallpaper, changed the background color to black, and the theme to PiXnoir, I also upped the font size
[greeter]
default-user-image=/usr/share/raspberrypi-artwork/raspberry-pi-logo.png
desktop_bg=#000000000000
wallpaper=/usr/share/rpd-wallpaper/RPiSystemdark.png
wallpaper_mode=crop
gtk-theme-name=PiXnoir
gtk-icon-theme-name=PiXflat
gtk-font-name=PibotoLt 24

The key is /etc/lightdm/pi-greeter.conf I edited this file as below, I copied the wallpaper and inverted it using GIMP then save the new file with dark into the same directory as the original wallpaper, changed the background color to black, and the theme to PiXnoir, I also upped the font size
Code:
default-user-image=/usr/share/raspberrypi-artwork/raspberry-pi-logo.png
desktop_bg=#000000000000
wallpaper=/usr/share/rpd-wallpaper/RPiSystemdark.png
wallpaper_mode=crop
gtk-theme-name=PiXnoir
gtk-icon-theme-name=PiXflat
gtk-font-name=PibotoLt 24
Statistics: Posted by Annie UK — Tue Apr 30, 2024 9:21 am