Here the gamma of the display is too high, which means that the mid-tones of the image are too dark.
Some will find the term being high and dark counter intuitive, however the physical number is high or
low over the reference and that where the discriptive term comes from.
It is of note that gamma is more influentual on image appearance for being flat or having punch and one
of the hardest to set absolutely right.
One of the main issues is that the viewing environment is interactive with setting gamma.