Thank you, I'll test it tonight and let you know.
On my side I've found a kernel patch called KCAL for Advanced color control that is supposed to work on the Qualcomm 8916 ( model inside the serranovelte )
This add the ability to modify all color settings through /sys/devices/platform/kcal_ctrl.0 files
OR using an app like EX Kernel Manager
https://play.google.com/store/apps/details?id=flar2.exkernelmanager
KCAL patch link is
https://xdaforums.com/android/software-hacking/dev-kcal-advanced-color-control-t3032080
The page also contains 2 youtube video that are showing what is the result of saturation color configuration on the output (which is very different effect than only modifying Red-Green-Blue components)
I've tried to go around and find some app that can modify saturation color, but as this kind of configuration is tied to the hardware, the app must handle the hardware and device has to be rooted.
I'll search further and let you know if I find other solutions.
Thank you anyway.