[ryanSrich]

> is correct for painting, it's incorrect for design

I disagree. It's a fundamental concept of Color Theory, which is a fundamental concept of design.

> What's wrong with black text?

Nothing. But you shouldn't be using absolute black. I tend favor #24242A.

I think it's unfair to call the site I linked to barely legible. The font is perhaps a touch too thin, but it's still very legible. Of course this is all subjective.