Default run0 background colors not working

[Lucas Sánchez <rated.ds@xxxxxxxxx>]

I recently updated to systemd 256 on my headless Raspberry Pi 4
running Arch Linux ARM, and decided to try the new run0. I found out
that when running it from ssh the default red and yellow background
colors for root and other users aren't working for me, although
manually setting --background does work. Setting
$SYSTEMD_TINT_BACKGROUND makes no difference.

Any ideas?