Statistics (or tools) on screen calibration & readability

1. What does a monitor calibration tool do?
2. Is a monitor calibration tool worth it?

What does a monitor calibration tool do?

Monitor or display calibration is the process of aligning your screen's colors with the standards set by the RGB (red, green, blue) color model. This model dates back to the nineteenth century, but it's also the standard for most TVs and computers.

Is a monitor calibration tool worth it?

Having a calibrated monitor ensures that the colors are accurate and the “grade” is also accurate, making it possible for the finished video to appear similar across many different devices. Color grading on an uncalibrated monitor may give you a false grade that appears very different when seen on a separate screen.