What pairs of colors are you concerned about? I would expect a color palette website to produce a bunch of issues when run through an automated accessibility ch

What pairs of colors are you concerned about? I would expect a color palette website to produce a bunch of issues when run through an automated accessibility checker, since Grey 3 is never going to have sufficient contrast with the Grey 4 displayed next to it on the site. But in practice, like when placing a dark text color on a light background, it looks like the colors on the site can generally be used in a WCAG-compliant way.