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The colors of GTK – GTK Development Blog
(blog.gtk.org)
The GNOME Project is a free and open source desktop and computing platform for open platforms like Linux that strives to be an easy and elegant way to use your computer. GNOME software is developed openly and ethically by both individual contributors and corporate partners, and is distributed under the GNU General Public License.
I think that's just how Mastodon handles the federation with Lemmy, there's not much users can do about it.