Comment 5 for bug 2045292

We looked at this during today's code review meeting, and after discussion I've nudged the lost and long overdue backgrounds a little darker. New branch, freshly rebased: https://git.evergreen-ils.org/?p=working/Evergreen.git;a=shortlog;h=refs/heads/user/sleary/LP2045292-less-intense-billing-status-colors-v2