I would first check the printer driver on the user's workstation.
Thank you for the suggestion-- do you know what problem I might be looking for on the printer driver?
Compare the driver version and OS to your machine. If they're the same, remove and reinstall driver. I've seen label size and position vary based on the above, but never had a color issue.
Your issue is very machine specific.
Sent from Bert's iPhone
Thanks, next time the color prints weirdly I will uninstall and reinstall the driver and see if that helps.