Hello
The Connection status will be Green if Primary server is up, but Secondary status is only shown in the Monitored Landscape page of OneClick Admin. If the Secondary is down then the Monitored Landscape will show "Not Ready" under Secondary Status.
if Primary goes down, and there is FT setup, OneClick will show a Yellow status.
if Primary goes down and there is no FT setup ,or Secondary is Down, then the status will be RED:
Hope that helps.
~Jay V