Sailor they are speed and wake. There's no legend on this link but pink is idle no wake and blue is on plane safe speed. Green indicates the traditional on plane channels. This map is more about the "progress" of the new channel markers.
Wow, my first impression is that the average angler is not going to know what to do out there, resulting in a lot of violations, with FWC not able to cover the area. I've crossed that area a few times in a sailboat, from Key Largo, to Long Key and out to Cape Sable, and it is hard to navigate and see some of the markers, not to mention the crab bouys. You have to know what you are doing, for sure.
On Friday I saw that the shoreline outside the marina down toward the campground has a new floating marker. I did not check but I expect it designates the beginning of the new idle speed zone.
When we returned in the afternoon, as I waited floating in the marina in my friend's boat while he tried to pull the trailer around to the ramp, he was accosted by a ranger with a large map on poster board. The ranger wanted his input on the new zones. My friend informed the ranger that he never takes his boat out east as it is not a shallow floating boat, but the ranger persisted in showing him all the gory details.
My friend is old, hard of hearing and a bit blunt, but apparently, the ranger was not going to let him go until he was "educated". I think it is all good, but I wish it didn't have to happen while I was baking in the afternoon sun with zero shade or breeze.
When we finally got the boat on the trailer my friend apologized for the delay, but I had full view of what was going on. I actually felt sorry for the ranger, but give him kudos for his persistence. My friend offered to let me go talk to the ranger for my education but I declined.
It's all good as far as I am concerned... and especially good for us paddlers!