Just came across this on Reddit. Unless I’ve completely missed something over the last few days, this is new, and I haven’t seen it pop up on here yet.
My guess would be that orange means daylight, blue means rain and black means night. No idea what the red/orange would be though, maybe morning/evening? I mean, I could actually be off with all of that. I’ve got no idea where this picture actually came from, could mean anything I guess.