I think a lot of this can be down to the emotional attachment of when you first started watching City.
For a lot of fans who grew up watching City in the 60s, they consider the sky blue socks with maroon turnover's as the "proper" City kit.
The reality is though, during our 122 year history of being called Manchester City and playing in blue, we've only worn those socks for 6 years. 1967-72 and in 2011.
They might well be your preferred colour, your favourite, but it's a bit harder to argue that it's the "proper" City kit.
I've got a huge amount of respect for
@Gary James , I wouldn't dare question his knowledge on the subject. When I have seen him post on this issue, he's said in some of the earliest seasons (early 1900s) it's hard to tell with any clarity exactly what kit was worn and why.
But what we can say with absolute certainty that City have worn navy blue socks for more seasons than they have worn sky blue with a maroon turnover.
The best evidence we have shows that City wore sky blue shirts, white shorts and navy blue socks pretty much solidly from inception until the 1950s. And again for periods in the 80s, 90s and 00s.
People suggesting navy blue is a new gimmick brought through by Nike or the current owners are actually very much mistaken.
Earliest Picture I can find 1898
First FA Cup win 1904
First League title win in 1936/37
1980s and 90s
So, going back to my original point, I grew up watching City in the 80s, so to me the "proper" City kit is sky blue shirts, white shorts and navy blue socks.
Looking back through history, this is also the combination we have worn most. It is the colours we wore in our first season, the colours we won our first trophy in, and they colours we won our first league title in.
It is also a combination that is completely unique to Manchester City. No other team in the world wears that combination as far as I'm aware.
For me the kit should represent our identity. If we can have an identity that represents our past, and is completely unique to us and makes us stand apart from every other club in the world, that sounds like the perfect solution to me.
If people don't like navy blue sock due to personal taste, that's of course entirely up to them. But people saying it's not a "City colour" are misinformed.
(Oh - but I'd be happy with sky blue with maroon turnovers too, that would be my second choice ;-)