I'm sure many people have remarked on this before, but the expectation of TV being grey when tuned to a dead channel is probably somewhat unfamiliar to younger

I'm sure many people have remarked on this before, but the expectation of TV being grey when tuned to a dead channel is probably somewhat unfamiliar to younger readers, who may expect the newer behavior of the TV instead showing a synthesized blue screen, or a textual error message! I wonder how many people may have read that more recently and thought that the sky was being described as deep, pure blue, rather than a difficult and chaotic grey.