I disagree with this. I actually really like the asthetic of having a mostly blue selection screen, rather than the jumble of clashing colors. I won't go so far as to say that one SHOULD use blue, but I don't believe there is anything wrong with it.

I would actually argue to stay away from the color black. Looking at my current home pane, I tend to forget that I have AirCam and Rev, AirCam in particular because it melts the most into the black backdrop.