The ports on the device view are color coded to provide at-a-glance port status. The table below shows the status assigned to each color.
Green
Port is up and operating.
Red
Port has been manually disabled.
Orange
Port has no link.
Light Blue
Port is in standby mode.
Dark Blue
Port is being tested.
Grey
Port is not reachable by Device Manager.
Pink
Port has a loopback connector connected to it.
In addition, the Help menu provides a legend that identifies the port colors and their meanings.