The value is currently a fixed color, and does not adjust based on light/dark mode, or with the system.
<rdar://problem/88043298>
This bug is unrelated to the default link color used in web views. This is specifically about the CSS value 'LinkText', which is by definition a system color: https://www.w3.org/TR/css-color-4/#ref-for-valdef-system-color-linktext.
Note that this bug is *not* about default link coloring in dark mode. This is a rarely-used feature for matching *system* link coloring, not default webpage link coloring. Bug 209851 is about the default webpage link coloring in dark mode.
As per https://bugs.chromium.org/p/chromium/issues/detail?id=1219739 I think VisitedText probably also needs handling too.
Is there a difference between the `-webkit-link` value and `LinkText` system color in terms of desired implementations? Aside from LinkText should compute to itself (presumably) whereas `-webkit-link` seems to resolve to an actual value.