That's more a theme issue than a settings one right? Also with the new theme in 18.10 the rows don't alternate colors, does that resolve the issue for you?
** Changed in: gnome-control-center (Ubuntu) Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ubuntu-themes in Ubuntu. https://bugs.launchpad.net/bugs/1721693 Title: Settings list separators conflict visually with list item backgrounds Status in Ubuntu theme: New Status in gnome-control-center package in Ubuntu: Invalid Status in ubuntu-themes package in Ubuntu: New Bug description: Settings list separators conflict visually with list item backgrounds. The separators should be more visually significant than the things they are separating, however the Ubuntu theme is using alternating light/dark backgrounds which drown out the separators. Screenshot attached. ProblemType: Bug DistroRelease: Ubuntu 17.10 Package: gnome-control-center 1:3.26.1-0ubuntu1 ProcVersionSignature: Ubuntu 4.13.0-12.13-generic 4.13.3 Uname: Linux 4.13.0-12-generic x86_64 ApportVersion: 2.20.7-0ubuntu2 Architecture: amd64 Date: Fri Oct 6 13:38:00 2017 InstallationDate: Installed on 2017-05-03 (156 days ago) InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Alpha amd64 (20170502) SourcePackage: gnome-control-center UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-themes/+bug/1721693/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp