Possible fix is to just make the dar ring go away when there is no Dar. Removes clutter...and easy to tell IMO.
I don't think that would be great, you wouldn't be able to tell when you were about to flash a base or not. It removes information. Maybe some would like that idea, but just saying.
Based on that screenshot HT posted if it were me, I'd have it a light grey and when it's down, almost white, with a bit more transparency. But I'm colorblind so what pops for me may not pop for normal folks.
Wiley.