The keys each display three colors depending on their state of actuation. In the default resting state (neither talking or listening) the switch display background color will be black with white text unless the operator has chosen a different palette from the Dashboard configuration tool. When a switch is in a Listen state or if it is signaling an incoming call, the background will either flash or display a solid green color. When a switch is in Talk mode, the background will display a solid red color. If a user attempts to Talk to a destination device that is unavailable or has chosen to disable their listen function, the key will flash red.