Default Screen mode..is possibile to change gamme values with root?

Hi
as you know the galaxy has different gamma options (cinema photo dynamic normal).
I think that the best in colors fidelity is cinema.But maybe is not still perfect..
is possibile with root to change values and create a new setting?
it would be interesting if some user expert in photo editing ecc sets new values on setting to create a new option better than cinema..if it's possible..