Update:

2017-04-21: Darken more bright borders (editable fields, more modals), add dark styling for drag and drop attachment overlay, lighten arrows on issue menu dropdowns, other minor tweaks.

2017-04-19: Darken border colors in modal dialogs

2017-04-18: Miscellaneous minor fixes including bulk edit

2017-04-13: Add dark styling for datepicker and fix miscellaneous bugs around the releases screens. Also darken the backlog create issue widget and lighten text in comment block quotes.

2017-04-10: Darken some white borders on the sprint board and backlog. Add dark styling for zephyr test view on sprint board.

2017-04-07: Fix styling when dragging a non-selected issue on the backlog and make the editable fields at the top of the backlog less blinding on hover and edit. Darken border color on text-areas in issue edit modal.