The display color coding on issue view pages is by status. In my development environment, the developers would really like to see color-coded displays by severity or priority instead of by status, so that they can see the most important issues to be worked at a glance when they view a project page. (Management likes this idea even more, needless to say!)

Rather than setting a hard-coded default in the system, it would be useful to make this configurable, either across the installation or (better) at the project level.