Two things happening here. First, look and feel may in fact be an artistic expression, which is copyrightable, and cannot be copied under copyright law. More i

Two things happening here. First, look and feel may in fact be an artistic expression, which is copyrightable, and cannot be copied under copyright law. More importantly, though is that look and feel may be trade dress, which is a trademark issue, because it helps consumers identify the source of the service. Do you look at Gitbucket's website, which does the same thing at GitHub, and think for a second you're not sure if this is a service that GitHub made? That's trademark infringement. We also learned about trade dress in the 80s. [1] [1] https://www.youtube.com/watch?v=29wNCH4RBrk https://www.youtube.com/watch?v=29wNCH4RBrk (Coming to America)