Evan writes about technology.
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I sometimes write about work,
but please keep in mind that I never speak for my employer.
That's some pretty poor subpixel rendering… if it's only going to make a one-pixel, vertical stroke, it should make sure to make it in grey rather than blue/red, since the illusion only works when the colour is dominated by a black.
That looks to me like regular subpixel antialiasing where the software assumes the wrong order of colours in a pixel.