Took me a moment to understand what's ironic, then I got it: the page discusses to use other visual (and also important, accessible text!) hints which don't sol

Took me a moment to understand what's ironic, then I got it: the page discusses to use other visual (and also important, accessible text!) hints which don't solely rely on color, to convey information, besides purely color-coded information. But then, the book uses solely the colors red and green to visually convey bad and good examples. The meta-irony here is that reitzensteinm's imgur image cannot be understood by any visually-impaired person ;)