Ok, stop. I totally agree with your thesis and POV, but guidelines cannot 100% declare how…
nina alter

I agree that guidelines cannot 100% measure usability — I talk about that in the article, where the contrast guidelines are in effect subverted by using very light weight fonts that have far lower contrast than those available when they were written in 2008.

The material design guidelines on the whole are great, but the contrast choices undermine them, and lead to the kind of mistake in the Google AppEngine screen I showed initially. Everything on this page looks good until we get to contrast, which undermines the entire thing.

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