Why do we even reinvent (bikeshed) Whonix XFCE branding? 
Can’t we just fork / copy these settings from another project which already figured that out?
Isn’t there a bunch of popular Linux distributions supporting XFCE who figured out decent XFCE theming already?
- Popular.  Linux distributions which have good usability and considered beautiful are more likely to be popular, yes?
- Using XFCE theming settings which are (mostly) compatible with what’s available from packages.debian.org.
- “generic” theming 
Which Linux distributions would be adequate as base to fork / copy over their XFCE themeing to Whonix?
Putting Whonix-Host, Whonix-Gateway, Whonix-Workstation, Kicksecure looking different put aside. This is something which can and should be done on top of this.
 We’re unfortunately not a distribution focused on beauty, usability, fashion. Can’t focus on everything at the same time. This takes time away from other tasks. We reinvent things in inferior ways while we could just take what works from elsewhere.
 https://distrowatch.com probably being the best place to figure that out?
 Obviously we couldn’t use a wallpaper saying “linux mint” (if that was to exist).