Yep, that's the same as Edicts. I chose blue as the color personally, because they can trigger at any time. Nice to see some more ideas for such.
Trade Hub could just be a once-per-turn Event though. I tried something like Rise of Industries in the past, and well, it wasn't popular. Although on second thought I think what I tried was the opposite, that the game can not end on piles. This is better, but has some of the same issues. Regardless, you might want to take a look at Edicts (Shard of Honor's link), for some inspiration at least.