The files in libcolord/ are all LGPL with the exception of colord.h and cd-color.h, which are GPL. This looks to be an oversight.
commit 2a07fd394bab8dc11116c86a932c592277e59269 Author: Richard Hughes <richard@hughsie.com> Date: Tue Jul 12 09:06:47 2011 +0100 Fix the licence headers in colord.h and cd-color.h Many thanks to Christopher James Halse Rogers for spotting the problem. Fixes https://bugs.freedesktop.org/show_bug.cgi?id=39153
Use of freedesktop.org services, including Bugzilla, is subject to our Code of Conduct. How we collect and use information is described in our Privacy Policy.