Tools > Options > Calc > View (TOCV) > Visual Aids seems to be obsolete after bug 152184 / https://gerrit.libreoffice.org/c/core/+/149059 making (General) > Application Colors (AC) > (Spreadsheets) > Grid lines the primary color. Before this patch the grid color was set via Calc > View if AC was COL_AUTO; and TOCV being initialized to SC_STD_GRIDCOLOR = COL_LIGHTGRAY. I suggest to remove the extra definition of grid colors from TOCV (sc/source/ui/optdlg/tpview.cxx), adjust the view options to follow svtools::CALC_GRID (sc/source/core/tool/viewopti.cxx), and use ColorConfig::GetDefaultColor() in sc/source/ui/view/viewdata.cxx. See also bug 118295
Tentative patch at https://gerrit.libreoffice.org/c/core/+/149715
Heiko Tietze committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/core/commit/2039fd382af9d110bd68be8629ab757b3617926a Resolves tdf#154446 - Remove redundant option for grid line color It will be available in 7.6.0. The patch should be included in the daily builds available at https://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: https://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.