I totally agree about the colours of kits before any of us were born. In fact, made that point re: the green kit, this time last year.
But, honestly, I doubt there's a professional team on the entire planet which sticks to club colours for its home and away kits. Would be dull as hell.
Oh, and...
Don't think you've grasped the commercial nature of modern football kit design.
(Also,there's plenty of history of yellow, and even a bit of green if you go way, way back).
Wonder if the away shirt is actually purple? Black again would be pretty boring.
Either way, the three kits in use will be pretty dark.
Oh, and are we all just accepting that our home kit is changing EVERY SEASON now?