Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I've successfully used Color Oracle on Mac, Windows and Linux in the past, and it's a wonderful tool for testing designs for colour blindness, but it's not working for me on Ubuntu 12.04. It installs, I've re-enabled the system tray icon, but running it produces a screen like this:

blank screen

I'm using two monitors, but removing one doesn't help.

share|improve this question
add comment

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Browse other questions tagged or ask your own question.