John
The FX bin uses two colors for the names of plugins. Gray for being bypassed and green for being active.
Actually I think bypassing the FX bin turns the color a darker shade of blue, not gray. There is gray FX Bin text but I can't remember why it was gray. I asked about it in another post but no one knew the answer and I've found nothing in the Help files about it.
I believe the FX Bin text color could be changed in pre-X series Sonar so probably why you still see it listed. The color list hasn't been completely revamped for the X series yet.