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> Greyscale with wrong gamma and/or wrong blend mode isn't fatal, it is fatal with subpixel.

I might not be fatal with black-on-white or white-on-black, but grayscale is pretty much still horrible with colored text and background.

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Which is why the greyscale should be done with an alpha channel, so it correctly blends with the background, and supports coloured text.

That would be fine, if alpha blending was handled gamma-correctly in most software, but it isn't. Things go worse with alpha and subpixel-AA, that is just cursed.

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