In article , Davoud
wrote:


I just tweaked my monitor settings using a couple of the websites with
"free" setup images and this has certainly improved my views of photos
from a wide variety of sources. However I'm now finding that text in
Thunderbird, Google, Facebook, Amazon, etc. is a bit pale and lacking in
contrast.

Your Mac's built-in calibration utility System Preferences Displays
will do an excellent job of calibrating your display.

that's better than a website, but neither is particularly good because
they rely on a human eyeball and not a calibrated sensor.