Are you splitting the package for reasons of size? I have encountered in the past some people who can only comfortably read black-on-white and others who need white-on-black, so there is an accessibility cost to including only one. Both OS X and Windows, from memory, have both options available.
However, if it just won't fit I suppose one is better than none. -- Please include a high-contrast theme by default https://launchpad.net/bugs/30107 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
