Statistics (or tools) on screen calibration & readability

Fairly straight forward question, but I could not find any answers to it. Are there any known statistics regarding screen calibration & readability?

Are there any colors to avoid where screen calibration can create readability issues.

I was looking at the monitors in our office, the 'design team' has perfectly calibrated monitors. However, while walking around I noticed that others not on the design team have badly calibrated monitors. I noticed that some designs were 'harder to read' because of these badly calibrated monitors.

The contrast ratio of the design is AA. But I have a feeling that the bad calibration reduced the visual contrast somewhat.

There are plenty of guides showing 'how to calibrate your screen' however I could not find anything regarding the effect of bad calibration on UI / Design.