You are reading those lists wrong. It is a list of parts that have been released in that colour, ordered by the date those parts were first released. It doesn't mean they appeared in that colour in that year. Dark blue, for example, first appears in 1961 as a few non-System cars and again in the 1990s as some textile clothing for Scala figures, but doesn't appear as a System element until 2001 for Xalax Racer Pip.
This list helps visualise it better: https://www.bricklink.com/catalogList.asp?pg=1&colorInSet=63&sortBy=Y&sortAsc=A&catType=S
Same goes for other colours like medium blue: a few old bricks with no anti-studs and windows in 1949 and 1950 and next appears as some street sweeper brushes in the 1980s.
Light blue also has some windows in 1950, but besides some Aquazone baseplates in the 1990s and more Scala fabric clothing, doesn't appear again as a System element until 2003.
Admittedly there are some like Maersk blue which appears surprisingly far back, but dark blue, for example, which is far more common, never appears in any Space, Legoland or Castle sets during the 1980s and 1990s.
It's a bit of a gray area but certain elements like fabric clothing for Scala figures or sweeper brushes don't count in my books, and when there's a decades long hiatus for System elements (at best you get one or two niche parts the first few appearances) then I don't see how your argument against "revisionists" works so well. I'd like you to show where there was a similar spectrum of colours in the 1980s compared to today that wasn't your typical gray, black, white, red, yellow, blue, green or brown, etc.
You can see my comment above for dark blue.