Big Business 14 uses System Colors, which means large swaths of grey or gray prevail.
People may prefer a background with super contrast for better legiblity or mood effect.
Obviously on Windows 11, it would be nice to have White for the modern theme there. On the Mac, there may be built-in apps with woven fabric or other texture on the way.
Big Business 14 will test some Backgrounds like Metal, Concrete, Unicorn, and White. These will include Light and Dark versions and instructions for dropping in your own.