Why does the TV go blue?

[EduardoG]

Hi, I was wondering, you know when you change TVs to the AV (SCART) channel? Well is there a reason why there is a blue screen when there's no signal? I mean why isn't it red or green or something? Hopefully someone will know the answer, thanks in advance!

[jbeputnam]

No particular reason for it being blue. I suppose they wanted something neutral to stop anyone moaning. I mean, we wouldn't all like pink and purple polkadots on our SCART channel, would we?