The Libre colors aren't extracted in the SDF file. They are sitting here: http://opengrok.go-oo.org/xref/extras/extras/source/palettes/libreoffice.soc
Andras, any chance that you might look at it?
OK, I take this. (It's not trivial.)
Fixed on master. http://cgit.freedesktop.org/libreoffice/libs-core/commit/?id=f618e5fe2b1674eae680bf5793dadd3c7a86d186
closing