Modified GDM theme to match with Dracula's colors

You must install glib2-devel to run 'glib-compile-resources'

Debian

# apt install libglib2.0-dev

Arch

# pacman -S glib2

git clone https://github.com/xaeioux/DraculaGDM/
cd DraculaGDM
glib-compile-resources gnome-shell-theme.gresources.xml

I recomend you to backup the original gnome-shell-theme.gresource into your home directory with the command

sudo cp /usr/share/gnome-shell/gnome-shell-theme.gresource ~

After backing up you must move the modified .gresource:

sudo mv gnome-shell-theme.gresource /usr/share/gnome-shell

Then finish restarting GDM:

systemctl restart gdm

And you are ready to go :)