the coralui styles e.g. for table background, click area etc. are not applied in AEM 6.3 correctly - it looks "all gray".
see attached screenshots for comparison with AEM 6.2
to be precise the styling degrades more and more from AEM 6.1 .. 6.2 .. 6.3, for both overview and configuration detail view.
some button styling is also affected.
attaching more screenshots.
please note that also the mouse pointer is not correct in the configuration overview in AEM 6.3 when hovering over the configuration names.
Branch with fix merged to develop.
Long-term changes re: CoralUI to be dealt with in future, separate ticket.