I was on a pair of teams (why two teams? who knows) that worked with a given project for about five years. Every year or so, we'd change names - so I've been on "$PROJECT Access", "$PROJECT Insights", and some third thing I forget the name of.

I unironically suggested we just call ourselves $PROJECT RED and $PROJECT BLUE, and refer to the entirety of the team-pair as $PROJECT PURPLE. Nobody liked that, but it is what we ended up calling ourselves internally.