Command palette selection highlight nearly invisible

[choongng]

The command palette selection highlight is nearly invisible which makes it hard to see which item is active. In the screenshot below the "change cell to heading 2" item should have a high-contrast background but doesn't (its background is #f5f5f5 which is very close to the white background). I thought this was a regression but rolling the notebook package back did not help.

In case someone else runs into this a workaround is to put a following rule into the local custom.css:

.active>a {
    background-color: orange !important;
}

Tested in Safari and Firefox on macOS 10.14.