Minimal contrast sample: two colors plus context

A small Color Contrast Checker reproduction can be just a text label, its foreground value, the composited background value, and the font size and weight. Add opacity or overlay details when present. Test that minimal pair first, then compare it with the real page; if the ratios differ, the sample omitted part of the rendering context. Avoid stripping away the state that causes the failure. A minimal example should make the issue easier to diagnose, not hide it.