Make the new color names of the Tango palette translatable
These were added in 494cdeda

Change-Id: Ie81dd42e011bcc36884c3c4c31ac65d83bfe6e31
Reviewed-on: https://gerrit.libreoffice.org/41614Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Katarina Behrens <Katarina.Behrens@cib.de>