The problem has been resolved. Thanks everyone!
I posted this question a few weeks ago and originally it only asked about the Game of Life so it was closed as a duplicate of Shortest Game of Life. I changed the question to allow all life-like automata but it was closed again to my confusion. As someone said, there are distinct questions about rule 110 and 1D cellular automata so I didn't see how it was still a duplicate.
My argument is that my question was incorrectly marked as a duplicate when it was closed the second time, namely because:
- my question is a generalization of Shortest Game of Life
- answers from Shortest Game of Life could hardly be copied into my question without major rewriting
so I would like Life can be colorful! reopened.
(Now irrelevant side-note:
I had reposted the question but I realize that was the wrong thing to do. I should have made a meta post, so here it is.)