fdo#73263: Change the default color for reference border to non-red.

See the referenced bug report for the reason behind it.

Change-Id: I4284807adaf82ae9581208a13ebd5071d36be5c7
(cherry picked from commit 95a7e952552adb834f92d1477f83938e7c8d0204)
Reviewed-on: https://gerrit.libreoffice.org/7862
Tested-by: Markus Mohrhard <markus.mohrhard@googlemail.com>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>