I'm not questioning what you're saying, as it seems to be correct based on what I know (I may or may not have watched the Helvetica documentary) but what's with the graininess in the color picker? It doesn't fit with anything else I'm looking at on this topic.
My guess is to simulate how the colors will look on paper, they always look like they "pop" (god I hate that word lol) on a screen more than when printed out. You can turn it off by clicking "noise" at the top right.
The Swiss style seems to have influenced the covers of a lot of old sci-fi books, so I mentally associate these kinds of color schemes with faded old paper and sitting indoors on a rainy afternoon.
