I'm going to mark this as resolved but I am happy to investigate further if/when you grant access to me.

I faced the same issue when I changed the name of priorities (originally emergency, high, normal, low) in a prior version of osticketawesome. Since the class for the priority table cells (in queue-tickets.tmpl.php) used the real name of the priority (concatenation of 'osta_priority_' + priority_name), I had to change the css-file as well. Otherwise I just saw those lame colors.

I noticed some changes in staff-desktop.css - so maybe the problem is gone anyway.