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This reminded me of the first(?) sub-pixel typeface (by Miha as posted on Typophile in 2009) https://adamnorwood.com/notes/typophile-user-miha-is-doing-s...

And the first sub-pixel font Millitext from 2008, as mentioned in another comment.

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Apple II (1977) did an early version of this; it essentially had purple and green addressable colors in each pixel. With both on in a single pixel you got white text, but could also leverage two adjacent pixels, one with purple and one with green, to produce a half-pixel offset that could produce a smoother diagonal line than typical fixed coordinates.

https://en.wikipedia.org/wiki/Subpixel_rendering

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