When video or audio is on, it displays a green icon. The icon looks half-transparent as it displays in a very light green color.
When video is off, it displays a _gray_ video icon with a slash.
When audio is off, it displays a _red_ icon with a slash.
Why is the audio red when it’s off, but video is gray when it’s off? The red color seems to indicate some kind of warning and reminds me of an “on air” warning. It’s unclear whether the button represents the current state, or represents the action that the button will perform. In other words, is the audio currently off, or will pressing this button turn it off?