Rule #N: Use black and opaque text for your main text, not RGBA(0,0,0,0.8) or some such[1]. Please.
website motherfucker, reactive manifesto, you might not need jQuery, contrast rebellion, extensible web manifesto, slow web movement.
so many manifestos, so little time.
This is amplified when designers don't use relative scaling units for font sizes. Medium.com is a good example of presenting readable content, independent of DPI.
But many sites require substantial zooming to read comfortably, even with perfect vision.
Another major usability issue is disabling pinch-to-zoom on mobile devices. This is a behavior that users have come to expect.
I've had to explain to several older people that their iPad isn't broken when they couldn't zoom in on a product while shopping.
it give examples of sites with bad contrasting, but don't show what they would look like fixed up. Rule #1: if you're going to complain about something, give me a demo of the point you're trying to get across so I can see the benefit. You should even go as far as explaining the process you used.
just directing people to a bunch of links and "read this guide" does nothing