Originally Posted by ianchan1970
This may be obvious, but I just realized that calibrating a monitor can fix grayscale and gamma problems, but cannot fix incorrect primary colors!
Calibrating a monitor essentially ensures that the brightness of each RGB channel matches the desired gamma (2.5 or 2.2 typically), and calibrating the balance between the RGB channels sets the whitepoint of the monitor (D65 or 6500K typically).
This only ensures that grayscale is reproduced accurately, and that brightness does not affect the hue of a color.
However, it does _not_ guarantee that colors are reproduced accurately!
For that, the monitor's RGB primaries must be close to those of the encoding colorspace (Rec 709 or NTSC primaries typically).
If they are not, then you cannot get accurate colors from the monitor!
The only way one can obtain accurate colors from a monitor with poor RGB primaries is to remap the RGB values of the data.
As far as I know, no monitor allows the user to do this; only color-managed computer software (e.g. Photoshop) does this.
So I guess my point is, make sure your monitor's primaries are accurate!
Or, if you're working with images on a computer, make sure your software is color-managed!
[alas, no Windows web browsers are color-managed, and many non-pro image software are unmanaged]