This branch addresses a handful of color changes and contrast improvements. It doesn't solve everything from #19693, but I'm okay with that since the $brand- color changes aren't very good looking to me. We'll deal with that later.
- Darkens the close icon colors via
opacitychanges. - Fixes #20952 (closed) by darkening the
$gray-lightvalue. - In concert with the above fix, darkened
$grayand$gray-darkto keep the color scheme intact. - Darken the opacity of text in active list group items.
/cc @patrickhlauke