mmm I really doubt that was the real reason why you "dislike" the green message and that it was purposefully designed like so by Apple. I think this is a case

mmm I really doubt that was the real reason why you "dislike" the green message and that it was purposefully designed like so by Apple. I think this is a case of learned significance, for which you know that a green bubble means a message sent via SMS rather than the "smarter" message. Added to the fact the blue is often used by tech companies due to its fresh and modern connotation, you have the full picture on why your brain prefers the blue to the green message. That being said, I think Apple should have been more careful about making their message bubble pass contrast tests. But I doubt there was an "evil designer" carefully planning to make that bubble with lower contrast on purpose to make you dislike it.