/etc/X11/app-defaults/KxGeant++ is in geant321 1:3.21.14.dfsg-11build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 | ! This file gives X defaults for KXterm when run by GEANT.
! Use light gray widgets instead of the hideous default blue
KxGeant++*background: gray
KxGeant++*dirlist*background: gray90
KxGeant++*foreground: black
! and decent fonts instead of "fixed"
KxGeant++*fontList: *-helvetica-medium-r-normal*-120-*
KxGeant++*XmText*fontList: *-courier-medium-r-normal*-120-*
! and make the transcript pad a reasonable size
KxGeant++*outputForm.height: 200
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