Select the color of each existing job category in the Job Listings’ settings. Can set the color to be the background color, or text color.
Documentation will be maintained on the GitHub Wiki here.
You can contribute code and localizations to this plugin via GitHub: http://github.com/tripflex/wp-job-manager-cat-colors
If you spot a bug, you can of course log it on Github
Or contact me at myles@smyl.es