Dark blue means, "charging is stopped and the car is locked and the port flap is open".
What do you want to do next?
A. Charge the car: I would close the flap and re-open it using the button on the cord, then plug it in.
B. Unplug charge cord if it's plugged in: unlock the car from the fob, press the button on cord, pull it out.
C. Drive if already unplugged: close the flap, get in and drive.