I think the dark color indicates it's not paired with another tile.
it is connect to another one. I use them as Elevator on my house : p
cause I to lazy.. to use stairs on my house lol ,
That happen for 2 reasons, either is not conected or is out of charge.
I had this happen to a house teleporter before.
I forgot to get the one it was linked to, when I sold a house.
I had it transferred back to my home shard and it became that color.
At first, it wouldn't let me link it to another teleporter.
But months later, I tried again and it let me link it to a new one.
As soon as it linked to the new one... the color returned to normal.
just unlink and re-link the tiles.
It should go back to normal
