I am troubled by how EVERY single example you have violates WCAG minimums. But that's typical of these types of artsy-fartsy articles as they're often written by artists under the DELUSION they're some sort of designer.

Despite being utterly devoid of the most basic engineering knowledge that separates Desgin from being "just art".

See the cyan, orange, and salmon in your "text" example, where for many users those are completely illegible... and there's math to prove it.