@rasta yes, just install it in dom0 and run it. tasket’s script is a .sh, the official one is a .py. Tasket suggested putting the script in autostart for kde, but you really only need to run it once and it creates some color configurations under $HOME/.local/share/qubes-kde/…
In a nutshell:
dom personal:
cd /tmp
wget https://raw.githubusercontent.com/QubesOS/qubes-desktop-linux-kde/master/qubes-generate-color-palette
now manually inspect qubes-generate-color-palette, make sure it is not nefarious
dom0 as your regular user:
mkdir -p ~/bin
qvm-run --pass-io personal 'cat /tmp/qubes-generate-color-palette' > ~/bin/qubes-generate-color-palette
chmod +x ~/bin/qubes-generate-color-palette
~/bin/qubes-generate-color-palette
and magic, borders should work without even restarting kde 