This is not the final website. It is a demo of the real tool working, made for Y Combinator.
AxisRemedy

04-001 Information is conveyed by contrast, color, format or layout, or some combination thereof but the content is not tagged to reflect all meaning conveyed by the use of contrast, color, format or layout, or some combination thereof.

Meaning is carried by color, contrast, format or layout alone, with no tagged equivalent.

Checkpoint
04: Color and Contrast
ISO 14289-1 (PDF/UA-1) clause
7.1-6
Test type in the protocol
Needs a human judgement
Applies to
A single object

How AxisRemedy handles it

Left for you. A person has to judge this one. AxisRemedy does not test it; the report lists it as left for you.