[ghmerrill]

But it's not filtering out all colors in this case. The links are appearing colored even though (a) all other color is filtered out and (b) there is a CSS class in scope that specifically changes link color to black. It also turns off text decoration and cursor events. Again, it appears that when the "color" filter is turned on in the output style information, the text-decoration setting in this class is being processed, but the others aren't:

.isDisabled
{
color: black;
cursor: not-allowed;
opacity: 1.0;
text-decoration: none;
pointer-events: none;
}

When the color filter is NOT set, then the entire class is being processed (but of course OTHER colors aren't suppressed).